The universe throws a lot of puzzles at us, as Einstein well knew. Solving them requires logic, creativity, diligence, and a good memory. In this puzzle book, you can challenge your inner Einstein with logic, verbal, and number games, as well as some devious riddles. Every page offers something new.Puzzle types include cross math, logidoku, number sequence, letterbox, and plenty of number and word riddles. Over 190 puzzles. Answers in back of book. Spiral bound for easy puzzle working.