The Danish explorer Peter Freuchen was a character in every sense of the word, a man whose life would have made even Don Quixote jealous. While researching my new book about him, Wanderlust: An Eccentric Explorer, an Epic Journey, a Lost Age, I marveled at how much could be packed into just one life span—and how wide-ranging those adventures could be.

Born in 1886 and about six-and-a-half-feet tall, Freuchen began his career as an Arctic explorer, and I quickly lost count of how many times he almost died while facing down some extreme peril. Then there were his marriages, which tended to be open and eclectic: the first to an Inuit woman, the second to a margarine heiress, the third to a fashion illustrator for Vogue.