Walt Patterson is a physicist by training, an entertaining and lucid writer (he seldom misses a chance at wordplay -- note the title of this book), a fan of jazz and baseball and real ale, and an incisive popularizer of important but complicated matters. And yes, he's my friend. Remind me to tell you some day about several hours we spent years ago in the bookstores on and near Telegraph Ave. in Berkeley, scouring dusty shelves for out-of-print popular books on atomic energy, The Atom Is Your Friend and such.