Abel from Abel's Island, by William SteigRead about the other rodents on the list.
This story of how the mouse Abelard Hassam di Chirico Flint (Abel for short) gets separated from his wife and his civilized life and learns to survive alone on an island in the middle of a river is inspiring, funny, and elegant.
Also see John Mullan's list of ten of the best rats in literature.
--Marshal Zeringue