The problem
Mainstream large-print puzzle books are often generic, poorly typeset, and inconsistent in difficulty. We wanted an evergreen, gift-friendly product line with print-on-demand economics — and we wanted to add a new puzzle type without rebuilding the tooling every time.
What we built
Clear Print Press — four published titles, produced by a pipeline that treats a puzzle book like software.
- Deterministic puzzle engines. Pure-Python generators and solvers for Sudoku (unique-solution), themed Word Search, Codewords, and a forward-checking Crossword filler — each difficulty-ramped and reproducible.
- Print-ready interiors. Book builders lay out one puzzle per page via ReportLab in a locked design system — large type, solution cross-references, KDP-safe margins — and a cover generator computes spine width and bleed and renders a full press-ready wrap.
- A verification suite as QA. Every build re-derives its own invariants — puzzle counts, difficulty ramp, no duplicate words, folio integrity, cover dimensions — and fails loudly on any error. That gate is what lets "add a title" stay a config change.
Status
Live at clearprintpress.com, with four titles — Sudoku, Word Search, Codewords, and Crosswords — published on Amazon KDP at 100 puzzles each. A free sampler funnels through the site via an automated email flow.