Book excerpt: How can shadows determine the date and time of a painting by Johannes Vermeer? How did the Moon and tides cause the loss of King John’s crown jewels? In his newest book, Professor Olson, author of Celestial Sleuth and Further Adventures of the Celestial Sleuth, explores how astronomical clues can uncover fascinating new details about art, history, and literature. He begins with an accessible introduction to amateur “celestial sleuthing,” showing how to use your astronomical knowledge, software, archives, vintage maps, historical letters and diaries, military records, and other resources to investigate the past. Follow along as Professor Olson then explores twenty real-world cases where astronomy has helped answer unresolved questions or correct longstanding interpretations about an event. Examples involve artists such as Vermeer, Monet, and O’Keeffe; the historical exploits of Alexander the Great, the desert travels of the Death Valley ’49ers, and a meeting between Franklin D. Roosevelt and Winston Churchill in Marrakech; and literary works by Chaucer, Shakespeare, and Longfellow. Packed with dozens of full-color illustrations, this book will enrich your knowledge of the past and equip you with all the tools you’ll need to become a celestial sleuth yourself. “Many people have a passion for art, or world history, or great literature, or even astronomy — but seldom in all these things at once. This remarkable book by Donald Olson of Texas State University will put you in touch with such seemingly unrelated endeavors. It will open your eyes and broaden your mind as little else could.” Roger W. Sinnott, Sky & Telescope