Nicholas Sparks is best known for his successful, romantic novels and was an instant success with his debut, A Walk to Remember, which had a 48-week run on PW's hardcover and paperback weekly lists combined. Now he lands in the #7 slot on our hardcover nonfiction list with Three Weeks with My Brother, a poignant memoir co-written with his older brother, Micah. Warner sent the siblings on a 14-city promotional tour and printed 501,000 copies.