Holmes presents the latest collection of medium sudoku - brain fitness. kakuro levels 12x12, 13x13, 14x14, 15x15. Killer sudoku 8x8 medium levels. Killer sudoku puzzles with the names: "Sums Sudoku", "Sums Number Place", "Samunamupure", "Kikagaku Nampure", "Sumdoku". Book for superior mental support. Additionally, there are download links for 500 puzzles. I hope you enjoy this book. Best Regards, Basford Holmes