Have fun with more than 160 puzzles based on numbers and logic! More than 15 puzzle types are featured, including sudoku, Futoshiki, chain sudoku, fillomino, kakuro, cross sums, mastermind, hitori, cross-math, black diamonds, calcu-doku, and logidoku. Each puzzle provides directions, so you can easily learn about puzzle types that are new to you ! Large print makes these puzzles easy on the eyes. If you need a hint, a complete answer key is found in the back. Spiral binding, 192 pages.