About Loretta Johnson Hammer Loretta Johnson Hammer teaches fourth grade. After graduating from Washburn University with a BA, she received her MEd and EdS from the University of Georgia. She lives in Georgia. Books by Loretta Johnson Hammer The Tree That Owns Itself by (author) Gail Langer Karwoski & Loretta Johnson Hammer illustrated by James Watling Ages 8 to 12 Grades 3 to 7