This puzzle book will keep sudoku fans busy for hours on end and would make a great gift for an owl lover or birder. With four levels of difficulty, beginners and seasoned puzzlers will enjoy this book. Rules and tips for solving the puzzles are included in the introduction and the solutions are provided at the back of the book. With only one puzzle per page, there is plenty of room for listing the possibilities in each square. Sudoku is a fantastic way to hone logical thinking skills, keep the brain active, relax, and escape the chaos of the day. Features: Large print instructions - 100 large print puzzles - 1 puzzle per page - 6 solutions per page at the end of the book - Beautiful artistic softcover with a matte finish - 6 x 9 inches - 124 pages