One-of-a-kind animals can be as familiar as the platypus or as unfamiliar as the purple frog. These fascinating and mysterious species belong to an exclusive club of living things: those with no close living relatives, making them monotypic species. Meet more than a dozen of these creatures (including humans!), learn what makes them unique, and explore the relationships among species on the evolutionary tree. Written by NCTE Orbis Pictus award-winning author Sneed B. Collard III, this fascinating nonfiction picture book is ideal for kids, teachers, and librarians and includes extensive back matter and activities.