"This is a book about magic, about the Beatles, about the chemistry between people, about neuroscience, and about the buddy system; it examines love and hate, harmony and dissonance, and everything in between. The result is wise, funny, surprising, and completely engrossing." -- Susan Orlean Lennon and McCartney, Steve Jobs and Steve Wozniak, Pierre and Marie Curie. Throughout history, partners have buoyed each other to better...