Contains puzzles that first baffle and then delight problem solving addicts. Grew out of a collaboration between Bob Tappay and Martin Gardner to enliven the le

Great ideas often develop gradually after studying a problem at length--but not always. Sometimes, an insight hits like a bolt from the blue. For Archimedes, cl

In a book perfect for readers of Charles Duhigg’s The Power of Habit, David Eagleman’s Incognito, and Leonard Mlodinow’s Subliminal, the cognitive neurosc

A practical guide to fostering innovative insights and solutions for yourself and your organization—including online skill-building exercises. We have all exp

Previously published separately, the two books aha! Gotcha and aha! Insight are here combined as a single volume. The aha! books, as they are referred to by fan