Masyu is a logic puzzle with simple rules and challenging solutions. It is played on a rectangular grid of squares, some of which contain circles; each circle is either "white" (empty) or "black" (filled). This Logic Puzzles book is packed with the following features: - 500 Masyu (10x10) Puzzles from Easy to Hard. - Answers to every puzzle are provided. - Each puzzle is guaranteed to have only one solution. Includes free bonus puzzles you can download book (Tons of Sudoku Puzzles for Adults & Seniors) Includes free bonus puzzles you can download book (Word Search With Hidden Message: 102 Puzzles for Adults and Seniors)