""Change of Air: Or The Diary of a Philosopher in Pursuit of Health and Recreation"" is a book written by James Johnson and first published in 1831. The book is a travelogue and diary of Johnson's journey to various parts of Europe in search of better health and relaxation. Johnson, a physician and philosopher, believed in the importance of fresh air, exercise, and natural surroundings for maintaining good health and well-being. The book is divided...