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You want to fast, and you want a book that actually tells you how to get through the hours instead of just lecturing you about willpower. That is the whole decision in front of you. The right book gives you a plan, a page to write on, and a realistic picture of what hours one through twenty feel like, so you can start on Monday instead of guessing. The five below split cleanly by what you are fasting for: a spiritual 21-day fast, a 45-day plan built around women’s hormones, an intermittent fasting starter course, a deep spiritual-and-physical manual, and a full step-by-step lemonade cleanse.
This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Before you flip to the reviews, know the one thing that decides whether a fasting book works for you: whether it matches the length and the purpose of the fast you actually intend to do. The picks below are sorted on exactly that basis, which is why this list of the best books about fasting covers journals, plans, and spiritual guides rather than five near-identical diet paperbacks.
Top Picks
How To Choose The Best Books About Fasting
The fastest way to waste money on a fasting book is to buy the wrong type for the fast you have in mind. A book built for a spiritual 21-day church fast will frustrate someone who wants to skip breakfast and shrink an eating window. A 336-page hormone program is wasted on a reader who just wants a page to log hunger each evening. Match the type first, then read the page count and the format.
Decide which fast you are actually doing
A spiritual fast is about prayer and discipline over a set number of days, so you want a book with daily passages and space for written responses. An intermittent fast is about an eating window — a schedule you repeat weekly — so you want a plan book that explains several window patterns and tells you what to eat in the open hours. A cleanse is a fixed short run on a set drink recipe. Each of those three wants a different book, and picking the wrong one is the most common buyer mistake.
The books here range widely in depth. One runs 128 pages and doubles as a workbook. Another runs 336 pages and walks you day by day. Page count is a fair proxy for how much hand-holding you get: a shorter guide expects you to bring your own routine, while a longer program supplies one for you.
Check whether you get pages to write on
A journal-style fasting book is a different product from a read-only one. If you know you stick with things better when you log them, look for a book that prints questions and blank space on the page — you are buying the habit as much as the information. If you want pure explanation and no writing, a program or reference book suits you better.
Match the author’s angle to your reason
Some fasting books come from a faith perspective, some from a clinical one, and some from a wellness-coaching one. Read the subtitle carefully — words like spiritual, hormonal, or cleanse tell you the lane. A book written around women’s hormones is built for a specific reader and goes deeper than a general guide can. A book built around a lemonade recipe is a protocol, not a diet philosophy.
Side-by-Side Comparison
| Model | Best For | Print Length | Item Weight | Format Angle | Amazon |
|---|---|---|---|---|---|
| Fasting Journal★ Best Overall | A 21-day spiritual fast with daily writing | 128 pages | 9.6 ounces | Workbook with journaling pages | Amazon |
| Intermittent Fasting For DummiesBest for Beginners | Learning several eating-window plans | 320 pages | 15.2 ounces | Beginner course covering 5 plans | Amazon |
| The Transformational Power of Fasting | Spiritual and physical depth in one book | 224 pages | 10.5 ounces | Deep read on body and spirit | Amazon |
| The Complete Master Cleanse | Running a lemonade cleanse safely | 208 pages | 2.31 pounds | Step-by-step protocol guide | Amazon |
| Intermittent Fasting Transformation | Women following a 45-day fasting plan | 336 pages | 13.8 ounces | Day-by-day program for women | Amazon |
Detailed Reviews
1. Fasting Journal
Our pick — 4.5+★ from 850+ verified ratings; the strongest balance of quality and price.
The slim 21-day workbook that turns a fast from a vow into a daily habit.
If you have ever started a fast on a Sunday and quietly given up by Wednesday, this is the one to buy. The whole book is built around 21 days — a length that matches the Daniel fast many churches run together — and every day asks you to write something down. That blank space is the point. Logging each day gives the fast a visible shape, and seeing day five filled in is what gets you to day six.
At 128 pages it is the lightest read here, and at 9.6 ounces it slips into a bag without dragging on your shoulder. Compare that with the 320 pages and 15.2 ounces of Intermittent Fasting For Dummies below and you can feel the difference in your hand: this is a companion you carry, not a reference you keep on a shelf. The information inside is not thin, either — the content and the explanation are what carry the book for most readers, with the writing style and the value holding up behind them.
What makes it work as a gift is that it assumes nothing. It frames fasting as an invitation to deepen prayer and discipline rather than an obligation, and it is written plainly enough for a teenager taking on a first fast. Buyers report it fits a church-wide fast too — one reader started on day five of a first 21-day Daniel fast and the journal inspired a corporate fast at their church. One thing worth knowing before you buy: the journal repeats material you will find in the companion book and DVD, so pick one format rather than stacking both.
What earns the top spot
- 21 daily entries with questions and room to answer them, so the fast has a visible shape
- 128 pages and 9.6 ounces — light enough to carry to a morning prayer session
- Plain enough for a first-time faster and for a teenager, with no assumed background
Where it asks something of you
- You have to actually write in it; a reader who wants pure explanation will find the blank space wasted
- The content overlaps the author’s companion book and DVD, so buying both doubles up
Buy this if: you are doing a 21-day spiritual fast and you want daily structure plus a place to record it.
Look elsewhere if: you want an eating-window schedule rather than a prayer-focused journal — the Dummies book covers that ground instead.
2. Intermittent Fasting For Dummies
Five eating-window plans explained in plain English, no prior knowledge assumed.
The job of this book is to stop you guessing which schedule to follow. It lays out five different fasting plans in one place so you can pick a window that fits your day rather than copying whatever a coworker is doing. Choosing your own window is what keeps you fasting past week one. If three fasting apps left you more confused than when you started, this book sorts the schedules out in one place.
It is a real book, not a pamphlet — 320 pages and 15.2 ounces — so it lives on a desk rather than in a coat pocket. The writing is simplified on purpose, the kind of short-form explanation you can read a section of on a lunch break and act on the same evening. Readers consistently come away saying the information is put within easy reach and the eating approach finally makes sense.
One useful quirk: the author comes down against pairing keto with intermittent fasting and points you toward a Mediterranean style of eating instead. One buyer reports following that combination — a 17:7 window, Mediterranean meals, and 25 to 30 minutes a day on a Cubii — and losing 29 pounds over seven weeks. The author also allows a little sweetener in coffee and a splash of flavoring in water, which is looser than the stricter fasting guides and worth knowing if you are a coffee person.
What it does best: it consolidates the whole intermittent fasting landscape into one readable volume and hands you five plans to choose from — no cross-referencing three websites at midnight.
Reach for this if: intermittent fasting is new to you and you want the full menu of schedules explained before you commit to one.
Pass it by if: you already fast on a fixed window and only want recipes or a log — this gives you neither.
3. The Transformational Power of Fasting
What actually happens to your body on day one through day forty, told with care.
Most fasting books tell you what to do. This one explains what will happen to you while you do it, hour by hour and day by day, with the physical repair story and the spiritual one told side by side. The author walks through the bodily changes across a fast from day 1 to day 40, draws a clear line between fasting and starvation, and details how the body repairs and rejuvenates. It also traces fasting’s use across different religions, so the practice reads as old and widespread rather than a modern diet trend.
It is the most compact of the deeper reads at 224 pages and 10.5 ounces, and noticeably smaller on the shelf than the 7.3 x 9.1 inch footprint of Intermittent Fasting For Dummies — an easy one to keep in a nightstand drawer. Readers single out the prose as the reason they reread it. Readers describe the prose as the work of someone who treats English like a craft, and many say it stands above purely physiological fasting books because it takes the emotional and spiritual side as seriously as the physical.
Here is the honest catch: the practical how-to is thin. The step-by-step guidance is squeezed into a few pages near the end, with some recipes tucked in, so a first-time faster hunting for a literal instruction sheet may close the book still unsure what to do on day one. It rewards a slow read and a reader who already has some fasting behind them. Approach it as the why and the what-happens book, and pair it with a plan book if you need the how.
Strengths worth the shelf space
- Maps the body’s changes across day 1 through day 40, so you know what each stage feels like before you reach it
- Treats the emotional and spiritual side as equal to the physical, which most fasting guides skip entirely
- Compact at 224 pages and 10.5 ounces, with writing people return to and reread
The trade-off to weigh
- Practical step-by-step guidance is short — a few pages near the end rather than a full protocol
- Written for someone with fasting experience, not a total beginner wanting a daily checklist
Best matched to: readers with a fast or two behind them who want the science, the spirit, and the story in one volume.
Not the one for: a first-timer who needs hand-holding on day one — the Dummies book or the 45-day program gives you that.
4. The Complete Master Cleanse
The lemonade cleanse laid out as a real protocol, prep to finish, not a scattered internet thread.
This is a different animal from the other four: it is a protocol, not a philosophy. If you have decided to run the Master Cleanse and now need the actual steps — the recipe, the day-by-day, the mental guidance for the hard hours — this book pulls the whole thing into one organized place instead of leaving you to piece it together from forums. The author studied with the cleanse’s originator and adds a longer advanced version refined over three decades of coaching.
The practical detail that matters most here is what surrounds the fast itself. It walks you through prepping your body before you start, coaches you through the mental and emotional wall that makes people quit early, and — this is the part scattered sources leave out — explains how to break the fast properly so you keep the results. Most of the buyer interest lands on how informative the book is, with how readable it feels close behind. Readers describe the tone as non-preachy and organized, and the whole thing runs 208 pages.
Read the label carefully before adding this to your cart: it is not gentle. The cleanse itself is hard, and the book says so rather than promising a spa week. Owners mention it is not for the faint-hearted and that you should research before starting, with the reward coming to those who push past the rough days. One detail that surprises people — it is a heavy paperback at 2.31 pounds, so it stays on the kitchen counter rather than traveling in a bag. If you want a fasting book about skipping meals rather than drinking a lemonade recipe, look to the intermittent fasting picks above.
Why it holds its place: the prep and the break-the-fast sections are what separate a cleanse that works from one that ends in a bad afternoon.
Know before you start: this is a demanding protocol, and the book frames it as one — not a casual reset.
Choose it when: you have committed to the Master Cleanse and want the complete, organized protocol in hand.
Think twice if: you were hoping for a gentle intro to fasting — this is a concentrated lemonade cleanse, and the book does not pretend otherwise.
5. Intermittent Fasting Transformation
A 336-page, 45-day plan written for women’s hormones rather than a generic schedule.
Most intermittent fasting books are written as if men and women fast the same way. This one starts from the opposite assumption and builds a whole program around it. The author, a nurse practitioner, explains how women’s hormones affect whether a fast works, then builds that into a 45-day plan with daily actions, high-protein and low-carb menus, and recipes. It is the longest book on this list at 336 pages, and the depth is the draw: readers say it goes well beyond basic fasting advice.
What wins people over is how it handles the science. Hormones like insulin, cortisol, the sex hormones, thyroid, and melatonin get explained across different life stages, so a reader in her forties sees her own situation on the page instead of a one-size plan. One buyer in her forties arrived with bloating, fatigue, and brain fog and found the day-by-day structure kept her on track. The recipes earn their own praise for being genuinely good rather than an afterthought, and the 45-day format carries over after the program ends.
The one gap worth flagging is a mismatch inside the book itself: it advises roughly a gram of protein per pound of ideal body weight, yet the sample menus land far short of that, and no research is cited for the target. Take the protein guidance as an aim rather than a rule the menus follow. The other consideration is simply size — at 336 pages and 13.8 ounces this is the heaviest reading commitment here, so it suits someone ready to work through a program day by day, not a browser.
Where the value sits: a women-specific hormone explanation plus a 45-day calendar and recipes — you are buying a full program, not just information.
Suits you if: you are a woman who wants a structured 45-day plan that accounts for hormones at your stage of life.
skip it if: you want a short read or a general fasting overview — the Dummies book covers the basics with far less page weight.
Know the Specs
Print length (pages)
Page count tells you how much work the book does for you. A short guide — 128 pages in the Fasting Journal, for instance — expects you to bring your own routine and adds a page to write on. A long program — 336 pages in the Intermittent Fasting Transformation — supplies the routine, day by day, with menus and recipes. Neither is better in the abstract; the right length is the one that matches how much hand-holding you want. If you want a fast-start read, go short. If you want a plan you follow for weeks, go long.
Item weight (ounces and pounds)
Weight is your clue about whether a book lives in a bag or on a desk. The Fasting Journal at 9.6 ounces is light enough to carry to a morning prayer session. The Dummies guide at 15.2 ounces sits on a desk. The Master Cleanse at 2.31 pounds stays on the kitchen counter, where you will actually use it. Weigh that against how you plan to read — a book you leave at home is a book you read at home.
Format angle: journal, program, or protocol
Three shapes recur here, and knowing which you are buying saves a return. A journal gives you questions and blank space so you record each day. A program gives you a calendar and menus so you follow a set number of days. A protocol gives you a fixed recipe and step-by-step instructions for one specific cleanse. Read the subtitle for words like journal, program, or step-by-step, and you will know which shape you are holding before you open it.
Author background and angle
The same subject produces very different books depending on who is writing. A faith-based author frames fasting as spiritual discipline. A nurse practitioner frames it around hormones and clinical guidance. A cleanse coach frames it as a coached protocol. None of these is wrong — they are just built for different readers. If the book’s angle does not match your reason for fasting, the information inside will feel beside the point, no matter how good it is.
Common Questions
Should I buy a fasting journal or a fasting plan book?
Is a 21-day fasting journal good for a first fast?
What is the difference between a spiritual fasting book and an intermittent fasting book?
How long does the Master Cleanse program last in the Complete Master Cleanse book?
Is Intermittent Fasting Transformation only for women?
Does the Dummies intermittent fasting book cover more than one plan?
Which fasting book is best for someone who already fasts regularly?
Do any of these fasting books include recipes?
How heavy is a fasting book to carry around?
Can I do the Master Cleanse using only internet instructions?
The Bottom Line
The cleanest starting point for most readers is the Fasting Journal: Your Personal 21-Day Guide to a Successful Fast, because it turns a fast into 21 visible days of daily entries and carries easily at 9.6 ounces. If your fast is an eating window rather than a spiritual season, reach for the Intermittent Fasting For Dummies for its five plans in plain language. Women wanting a structured, hormone-aware program should take the Intermittent Fasting Transformation and its 45-day calendar. And if the lemonade cleanse is already your decision, the Complete Master Cleanse gives you the prep-to-finish protocol rather than scattered pages. One tasteful nudge worth acting on: the top pick holds a strong rating with a deep pool of owners behind it, and the journal is the type of book you will actually finish — the shorter format makes starting today easier than starting someday.
How we choose
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of October 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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