Logic, math, and fun come all wrapped up in one tricky puzzle package. Each little story gives you just enough information to determine what's bigger, who weigh

Try any of these 150 word, number, and logic puzzles, and you'll encounter some surprising new ways to analyze, observe, and decide. You've been warned, so don'

Part of a fun range of pocket-sized puzzle books for adults. Designed to test your powers of deduction, determination and diligence, the cryptic codes, conundru

FLEX YOUR brain power like never before! From acclaimed author Dr. Gary Gruber, whose proven critical-thinking methods have sold more than seven million books,

Put your thinking skills to the test with fun and tricky brain teasers for kids 8 to 12 Get ready to flex your mind muscles and think outside the box with The 1