This book contains several popular pentomino puzzles, including the four "basic" rectangles: 6x10, 5x12, 4x15, and 3x20. In addition to the puzzles themselves, every unique solution (excluding flips and rotations) for each puzzle has been included. Some have only a single solution, while others have hundreds or even thousands. This novelty book contains color solutions for the selected puzzles - it is not an educational or children's play book.