This book documents the travels of a naturalist and his wife, Nellie I. Teale who spent four winter months traveling twenty thousand miles across the southwestern United States and parts of the Midwest, ending in northeastern Maine. He reports on the people, plants, animals, and birds they encountered. It is the final volume in his natural history of the four seasons in North America; a 76,000 miles journey over 15 years, which began with North with the Spring, Journey Into Summer, and Autumn Across America.