30-day challenge books for Amazon KDP
Make a 30-day challenge book with AI
One short, direct action per day, building toward the goal. You set the goal and who it is for; the plan spreads the 30 days across weeks, and the AI writes each day for you to review.
The account is free. The book costs from R$ 199, paid once, with no monthly fee.
Thirty days, one action a day
It is 30 days, no more and no less, each with one short action.
Building toward the goal
Days are organized into weeks, from the simplest to the most demanding.
Ready for KDP
PDF and DOCX in the formatting KDP asks for, and a cover with spine sized to your interior.
The cover comes ready too
Three variants built by the CoAutor cover engine for a sample book. You pick one, adjust colors and text, and download it with spine and back cover sized for KDP.
An excerpt written by CoAutor
This excerpt was written by CoAutor for a sample book, unedited. In your book, the text follows your tone, your material and your revisions.
Sample excerpt
Day 1 — Put Every Account on One Page
Today you're not paying anything, cutting anything, or feeling bad about anything. You're just taking attendance.
Grab one sheet of paper. Write down every place your money lives or leaves from: checking, savings, each credit card, the car loan, the student loan, the buy-now-pay-later balance you forgot about, the app with $14 sitting in it. Next to each one, write the balance. That's it. Twenty minutes, tops.
Most people have never seen all of it in one place. That's why the number in your head is always wrong — usually gentler than reality, sometimes much worse.
Tip: If you don't know a balance, write the account name and leave the number blank. A blank is honest. A guess will follow you for the next twenty-nine days.
How it works
- 1
Give the topic, who it is for and the book language (Portuguese or English).
- 2
Choose the angle and the title.
- 3
Approve the plan of weeks.
- 4
Ask it to write and review part by part, or the whole book at once.
- 5
Generate the cover and the description, and download the files.
What you get
- Thirty days, with one short action per day.
- Days organized into weeks, with progression.
- Fact-checking and automatic review.
- Cover with back cover and spine sized for KDP.
- Description for the Amazon page.
- Interior PDF and DOCX, ready to upload to KDP.
One payment per book
- Up to 15,000 wordsR$ 199
- Up to 30,000 wordsR$ 379
- Up to 50,000 wordsR$ 599
No monthly fee. The package does not expire.
To compare: the cover alone, from a designer, costs R$ 500 on average in Brazil, and interior layout R$ 6 to R$ 12 per page.
Frequently asked questions
Does the text sound like it was written by AI?+
The automatic review strips out repeated phrasing, overstatement and the "not X, but Y" formula, the most common tell of AI text. You set the tone and your own voice before writing, and review each part before moving on.
Do I need to keep the tab open while the AI writes?+
No. Writing runs on the server: you ask for it, close the tab, and an email tells you when it is done.
How much does it cost?+
You pay once per book, by size: up to 15,000, 30,000 or 50,000 words. No monthly fee, and the package does not expire. The account is free: you can create the book and see the path before paying.