Own business · Amazon KDP
Puzzle books on Amazon: 209 books and €13,120 in royalties in 2025
In short
I publish puzzle books through Amazon KDP. One line of 209 books earned €13,120 in royalties in 2025. Two books made 84.5% of that, and 2026 is running slower.
- €13,120royalties in 2025
- 209books in this line
- 84.5%of revenue from two books
- €5,330January – 12 Aug 2026
Challenge
Amazon has millions of books. A book sells only if buyers find it in search, and established publishers already hold the top spots.
My role
I do everything: topic research, generating content with code, quality checks, covers and descriptions.
Strategy
- Topics from Amazon’s own search suggestions, not guesses.
- Competition measured before a book is made: result counts and reviews on page one.
- Every book is checked with code before publishing.
Execution
- Python code builds and verifies the content: every puzzle is proven solvable.
- A print cost and margin calculator before pricing.
- Book titles, pen names and imprints are kept separate from this site.
Results
| Period | Royalties | Per month |
|---|---|---|
| Year 2025 | €13,120 | about €1,093 |
| 1 Jan – 12 Aug 2026 | €5,330 | about €724 |
Source: Amazon KDP royalty reports, read 12 August 2026.
What hasn’t worked yet
Revenue is concentrated: two books made 84.5% of 2025 royalties, and the biggest seller is down in 2026.
Figures are paperback royalties for one line, from KDP reports. Other lines are not included.
Next
Next: new topics with competition measured first, and better descriptions for existing books.