The Berenstain Bears and the Bad Habit by Stan & Jan Berenstain (Very good, 1986, Pbk, 32 pages, Random House)

Used in very good condition: cover has light wear; inside is clean. ISBN 0394873408

Illustrated in full color.
Come for a visit in Bear Country with this classic First Time Book® from Stan and Jan Berenstain. Join Mama, Papa, and Brother, as they try and help Sister break a very bad habit . . . biting her nails. Will she manage to get her bad habit under control, or will she end up stuck as a nail nibbler.