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