kdpbookaiA sudoku book lives or dies on one thing: every puzzle must have exactly one solution. A puzzle with two answers feels broken to anyone who solves it.
Difficulty
Fewer starting numbers make a harder puzzle. kdpbookai aims for these clue counts:
The book runs from easy to hard in three sections, so the reader warms up first.
One solution, checked
Each grid starts full and numbers are removed one at a time. After every removal a solver checks that only one solution is left; if not, the number goes back.
Answers
Put the answers at the back, several to a page, numbered like the puzzles. kdpbookai prints six answers to a page.
Print settings
Sudoku books in kdpbookai have 50–400 pages on 8.5 × 11 in, 8 × 10 in, 7 × 10 in, black ink on white paper. The cover has no picture: a solid color, the title and a small sample grid.
Is it low-content?
KDP's note: "Coloring and puzzle books are generally not low-content." So publish with an ISBN. See low-content books.
