Get your brain in shape with more than 300 logic puzzles! Mike Rios has devised a fun collection with 12 different types of cranium trainers, starting with easier ones and getting harder as you build your skills. Some—like nurikabe, dominoes, corral, and yajilin—are familiar to fans of the genre, while others are brand new. So sharpen your pencil, and your mind, and see how well you do.