To succeed in life, you must 'think outside the box'. This cliché is used to describe creative, non-standard approaches to problem solving. But how does one le

Take your brain to the gym and give it a good workout--no pain, no...

An intriguing collection of over a thousand specially commissioned riddles, mysteries, and verbal conundrums, this one-of-a-kind collection is guaranteed to bui

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,

It's like having a personal trainer for your brain!This huge book of brain teaser puzzles for kids is perfect for ages 9 - 12 and up. Included are long time fam