The Extraterrestrial Encyclopedia is an A-to-Z of the search for life in the Universe. Entries cover astrobiology, the origins and evolution of life, the hunt for exoplanets, SETI, and extraterrestrial life in science fiction, philosophy, and popular speculation (including UFOs). The book is written in an engaging style for the layperson and contains numerous B&W illustrations. David Darling is a science writer with a Ph. D. astronomy. He is the author of more 40 books, including Equations of Eternity (a NY Times Notable Book of the Year), Life Everywhere, Gravity's Arc, and, with Dirk-Schulze-Makuch, We Are Not Alone, and Megacatastrophes His most recent book is Mayday about pioneering aviators. His science website, www. daviddarling. info, is a popular Internet resource. He lives in Dundee, Scotland. Dirk Schulze-Makuch is a professor at the School of Earth and Environmental Sciences at Washington State University, and has published seven books related to the field of astrobiology and planetary habitability, including Life in the Universe, A One Way Mission to Mars, and Cosmic Biology. He is also an adjunct professor at the Beyond Center at Arizona State University and currently also holds a guest professorship at the Technical University Berlin in Germany.