"[Teaches young] readers about sightings and "proof" of [unicorns] from stories in history of people who sought unicorns, like Julius Caesar, Genghis Khan, and Marco Polo, to why they were hunted so fiercely. This book also discusses additional history about the creatures, such as why their horns were so valued in medieval times, their presence in pop culture, and people's ongoing search for unicorns in modern times"--Provided by publisher.