Adults puzzles book. 200 Kakuro and 200 Chain Sudoku. Hard levels.: This is fitness for brains.

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Holmes is a book of logic puzzles Sudoku heavy level of complexity. This is a worthwhile sudoku collection. - fitness for the brain. The Kakuro levels are 15x15, 16x16, 17x17, 18x18. Chain sudoku 9x9 levels heavy. A chain of Sudoku puzzles with the names: "Sudoku Girus," "Strymko." Book for superior mental support. In addition, there are links to download 500 puzzles. I hope you enjoy this book. Best Regards, Basford Holmes