The Once Books team
Once Books turns a few photos of one child into a printable picture book. The hard part is the Consistency Engine, which keeps that child recognisable from the first page to the last. This is the team building it.
Posts by The Once Books team
21 October 2026 · 6 min read
How we prove a Binairo has one solution
20 October 2026 · 6 min read
Personalised books and puzzles in the classroom
19 October 2026 · 6 min read
Printable puzzles for kids and adults, free to make
18 October 2026 · 6 min read
How to make and sell Binairo books on Amazon KDP
17 October 2026 · 5 min read
Make a free printable sudoku (and turn it into a book)
16 October 2026 · 7 min read
Why a picture nonogram almost never solves by pure logic
15 October 2026 · 6 min read
How to build a bedtime reading routine that sticks
14 October 2026 · 7 min read
How to make and sell nonogram books on Amazon KDP
13 October 2026 · 6 min read
Word search books for kids on KDP: what sells
12 October 2026 · 8 min read
How to self-publish a children’s picture book
10 October 2026 · 7 min read
Sudoku, word search or crossword: which to start with
9 October 2026 · 6 min read
Five maze shapes, and what each one does to the solving
8 October 2026 · 8 min read
Stripe Checkout without webhooks: a pull-based design
7 October 2026 · 7 min read
What actually makes a maze hard (we measured it)
6 October 2026 · 7 min read
KDP spine width and cover size: the exact formula
5 October 2026 · 8 min read
Picture books for big changes in a child's life
4 October 2026 · 8 min read
How to make and sell maze books on Amazon KDP
3 October 2026 · 6 min read
KDP sudoku interior specs: trims, margins and solutions
1 October 2026 · 8 min read
How we make sure every sudoku has one solution
29 September 2026 · 9 min read
How to publish a paperback on KDP: the checklist
28 September 2026 · 6 min read
Personalised Christmas books for kids: what to look for
23 September 2026 · 7 min read
Planner niches that sell on KDP
23 September 2026 · 7 min read
Journal niches that sell on KDP
23 September 2026 · 9 min read
How to make and sell planners on Amazon KDP
22 September 2026 · 6 min read
The two kinds of personalised children's book
22 September 2026 · 7 min read
Journal and planner interior specs: trim, gutter, bleed
22 September 2026 · 8 min read
How to make and sell sudoku books on Amazon KDP
22 September 2026 · 10 min read
How to make and sell journals and notebooks
22 September 2026 · 6 min read
How to make a picture book starring your child
22 September 2026 · 6 min read
Dated or undated? Which planner to publish
21 September 2026 · 7 min read
How to make and sell 3D spatial puzzle books on Amazon KDP
17 September 2026 · 6 min read
Large-print crossword books: a KDP niche worth publishing
17 September 2026 · 6 min read
KDP crossword interior specs: trim, margins and clues
17 September 2026 · 8 min read
How to make and sell crossword books on Amazon KDP
14 September 2026 · 5 min read
How to make a word search with a print-ready answer key
14 September 2026 · 7 min read
Word search book niches that sell on KDP
14 September 2026 · 5 min read
Large-print word search books: a KDP niche worth publishing
14 September 2026 · 6 min read
KDP word search interior specs: trim, margins and gutter
14 September 2026 · 8 min read
How to make and sell word search books on Amazon KDP
14 September 2026 · 6 min read
Free vs paid word search generators: what gets published
11 September 2026 · 5 min read
Meaningful gifts for a 1-year-old, not just more toys
5 September 2026 · 3 min read
Digital or hardcover: which personalised book to get?
4 September 2026 · 6 min read
How to find books where your child sees themselves
31 August 2026 · 6 min read
The cast and the sets: the art that holds a book together
28 August 2026 · 6 min read
Reluctant readers: how to get a child excited about books
21 August 2026 · 5 min read
Why childhood keepsakes matter, and what makes one last
18 August 2026 · 5 min read
The four locks behind a consistent AI picture book
17 August 2026 · 4 min read
Why AI picture books drift, and how we stop it
14 August 2026 · 4 min read
Why AI art usually isn’t print-ready, and how we fix it
14 August 2026 · 4 min read
Are AI personalised children’s books safe? What to ask
10 August 2026 · 3 min read
How to choose photos for a book that looks like your child