Fattypuffs and Thinifers (ISBN 1-903252-07-5) is a 1941 translation of the French children's book Patapoufs et Filifers originally written in 1930 by André Maurois. It concerns the imaginary underground land of the fat and congenial Fattypuffs and the thin and irritable Thinifers, which is visited by the Double brothers, the plump Edmund and the thin Terry. Fattypuffs and Thinifers do not mix, and their respective countries are on the verge of war when Edmund and Terry make their visit. Source: Wikipedia (en)