There's nothing better than a tricky brain teaser to test your intellect and satisfy your quest for mental challenge. The search ends with this colossal assortment of classics. You will find word puzzles, visual challenges, geometric puzzles, and still others that dare you to venture into a lateral thinking approach. There is something here to appeal to every kind of mind, with exercises to build your brainpower on every page, from bafflers that present their questions as a story or riddle, to bogglers that can be solved within 60 seconds.