In this beautifully written and deeply thoughtful book, Meredith Gill, one of the best scholars working in the field of medieval and Renaissance art history, tackles a highly compelling subject that has been “hidden in plain sight.” It considers the difference between medieval and Renaissance angelology, offering close readings of angels in the literary tradition and the visual arts (such as Guariento, Melozzo da Forlì, Raphael, and Rosso). It explores angels' relationship to the immaterial, as graceful bodies imbued with aria, and their meaning in the history of devotion and philosophy. Gill's writing style is in harmony with her topic, and her deeply engaging prose never fails to transport the reader into its beauty and mystery. Drawing upon earlier excellent work on St Augustine, Gill's extensive but lightly worn knowledge of Christian thought—a rare achievement amongst art historians today—lays the foundation for every chapter. The book is an essential read not only for art historians, but for anyone with an interest in medieval and Renaissance Christianity. This reviewer's only reservation is that the author's luminous description of visual works is paired with color plates that often squeeze images onto a small corner of the page, meaning that details from key works are best consulted online.