252 Multi Sudoku in 12 Variants

252 Multi Sudoku in 12 Variants brings together twelve kinds of overlapping-grid Sudoku, including Samurai, Sohei, Butterfly and Flower. Each book holds 252 puzzles spread across three rising levels, so your skills grow page by page.

There are three books: Easy to Hard, Medium to Very Hard, and Hard to Extreme. Because each book climbs through its range, the series suits solvers who like a steady build-up rather than a single fixed level. Start with Easy to Hard if merged grids are new to you, and move on when you're ready.

In every variant, the grids share boxes. Each grid follows the usual Sudoku rules, but the shared boxes belong to more than one grid, so you have to think across the whole puzzle rather than one grid at a time. Switching between twelve layouts keeps things fresh.

The books are printed at 8.5 x 11 inches. If you'd prefer to choose one exact level, see 240 Multi Sudoku in 12 Variants, which comes in single levels from Easy to Extreme.