Book excerpt: Sharpen your mind and strengthen your logic skills with one hundred new Sudoku-by5 logic puzzles, complete with step-by-step deductive solutions for every puzzle. In this series, puzzle difficulty is ranked as "Difficult" with numeric rankings ranging from 9 to 14. This book is a new type of Hybrid eBook/Print book. A hybrid book consists of a traditional paperback book, containing puzzles and answers, and an on-line companion set of web pages for the print book, containing detailed step-by-step solutions for each puzzle, instructions for each puzzle type, and other information related to the paperback version of the book. Each print book title has a unique Internet web URL that points the reader directly to the eBook information for that particular print book. You can preview the on-line extras and step-by-step solutions for this particular book at its URL: http://www.grouppuzzles.com/titles/BA3FE4E9/