Daniel Klein was in his seventies when his dentist said he'd need a denture plate, implants, and major restrictions in what he could eat. Instead of going under the drill, he headed to a Greek island to see if one of his favorite philosophers, Epicurus, could teach him something about the pleasures available only later in life. A travel book, a witty and accessible meditation, and an optimistic guide to living well, Travels with Epicurus is a delightful...