Sibyls--from the Greek word for prophetess--commanded a remarkable amount of respect and devotion in the ancient world for their ability to foretell the future. And even as they receded from myths and stories, they remained an inspiration to many of history's greatest artists.In his definitive and erudite book, Jorge Guillermo tracks the story of Sibyls through polytheism (in Greece and Rome), paganism, and into the seemingly disparate tenets of Christianity. With a remarkably rich set of historical and artistic examples that range from Homer to Virgil, from Boccaccio to Michelangelo, Guillermo pays tribute to the surprising and enduring history of these singular women.