Colourdoku: Sudoku by Colour

Sudoku, painted in colour. Colourdoku swaps the numbers for nine bright crayon colours. Same classic rules, a whole new feel: every row, every column and every box uses each colour exactly once. No maths, no number-crunching – just patterns, logic and that satisfying moment when the last colour clicks into place. LEARN IN SECONDS New to sudoku? Start with four little 4×4 Beginner puzzles that teach the rules with just four colours. By the time you turn the page you'll be ready for the full 9×9 grid. FIVE BOOKS, 84 PUZZLES • Beginner – gentle 4×4 starters • Easy – plenty of colours to start you off • Medium – fewer clues, think a step ahead • Hard – sparse pages for sharp minds • Insane – brutally tough puzzles where every single clue counts Every puzzle has exactly one solution, and every one can be solved with logic. A SKETCHBOOK FULL OF PUZZLES Hand-drawn grids, crayon colours and…