Well its a big book of puzzles similar to the earlier the big book of sudoku by the same publisher there is even less explanatory text consisting of two small paragraphs in the margin next to the first puzzle. This book of over 900 puzzles is the best book ive bought since starting sudoku years and years ago each puzzle is workable and i end up doing at least 2 puzzles a day unfortunately the book is no longer in print so im hoping that its republished. Big fun big challenges big book this collection offers more for solvers more than 940 fantastic superbly constructed sudoku puzzles they start out easy and get harder as they go so beginners can build skills until theyre ready to take the real brainbusters. Big fun big challenges big book this collection offers more for solvers more than 940 fantastic superbly constructed sudoku puzzles they start out easy and get harder as they go so beginners can build skills until theyre ready to take the real brainbusters. The big book of sudoku puzzles michael rios ny sterling publishing 2005 isbn 1 4027 3631 2 pc 320 pgs 80 pgs answers 10 x 8 unknown 20 years ago sudoku single numbers skyrocketed since 1984 as nikoli publishers japan formalized rules for a 3 x 3 number grid composed of 9 boxes using 0 9 numerals but once within box numerals 0 9 but once criss crossing the grid