Sudoku For Dummies, Volume 2 by Andrew Heron (English) Paperback Book
21,28 €
Of the 240 puzzles, 220 are the popular 9x9 puzzles, 10 are 16 x 16, and 10 are circular puzzles. Circular Sudoku (10 included: 3 Easy, 3 Tricky, 2 Tough, and 2 Diabolical). The puzzle is circular for a start, with 8 concentric rings.
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