Mr. Waldman read excerpts from two of his books for children. Wounded Knee, published by Atheneum Books, is the story of late 19th-century conflicts between the U.S. Army and Native Americans. On December 28, 1890, the disputes culminated in a decisive battle between the U.S. Army and a Lakota Indian village at Wounded Knee Creek, South Dakota. They Came from the Bronx: How the Buffalo Were Saved from Extinction, published by Boyds Mills Press, is about the Bronx Zoo’s effort to breed buffalo, beginning in 1907, when the animal was discovered to be nearly extinct. After his presentation Mr. Waldman answered questions from the students.