About
Clara Marsh Puzzles publishes pencil-and-paper logic puzzle books for adults under the name Clara Marsh.
What we make
Our first series, Expert Train Tracks, is built around one classic puzzle: lay a single railway route through a grid so that it matches the numbers beside every row and column. Each book holds 200 puzzles in rising order, from easy 8×8 warm-ups to expert grids.
How the puzzles are made
Every puzzle is generated from scratch and checked by an exact solver, which proves that it has one solution and only one. No puzzle is copied from anywhere, and none appears twice across the series.
The pages are designed for solving, not just for printing: large cells, clear numbers, a numbered ticket beside every puzzle, and full solutions at the back of the book.
Get in touch
Questions, ideas, or a puzzle that gave you trouble? Write to [CONTACT EMAIL].