The best-selling sports books in January 2015, according to the New York Times best-seller list.
1. THE BOYS IN THE BOAT, by Daniel James Brown (Penguin). A group of American rowers pursued gold at the 1936 Berlin Olympics.
2. CONCUSSION, by Jeanne Marie Laskas (Random House). The story of Bennet Omalu (who inspired the movie), the forensic pathologist who found proof that blows to the head caused the extreme mental deterioration of a former professional football star — unwelcome news to the N.F.L.
3. UNBROKEN, by Laura Hillenbrand (Random House).