Is it true that is a walk in the woods a true story based on the following text?

A Walk in the Woods: Rediscovering America on the Appalachian Trail is a 1998 autobiographical book by travel writer Bill Bryson, describing his attempt to walk the Appalachian Trail with his friend ''Stephen Katz''. The book is written in a humorous style, interspersed with more serious discussions of matters relating to the trail's history, and the surrounding sociology, ecology, trees, plants, animals and people.
yes