by Frank Ross, Jr.; Illustrated by Lee J. Ames by Frank Ross; illustrated by Ava Morgan by Millicent E. Selsam; illustrated by Lee J. Ames Isaac Asimov; Illustrated by Lee Ames by Sterling North; illustrated by Lee Ames by Frank Manchel; illustrated by Kelly Mark by Roy A. Gallant; illustrated by Lee Ames by Frank H. Forrester; Illustrated by Robert Eggers. by Jeannette Covert Nolan; illustrated by Lee Ames by Jean Reagan ; illustrated by Lee Wildish.