How heredity works

Salvatore "Sal" Murdocca (born April 26, 1943) is an American children's book illustrator. He is best known for illustrating the Magic Tree House series written by Mary Pope Osborne (from 1992) and the nonfiction Magic Tree House Fact Checkers by Osborne and collaborators (from 2000)—about 50 and 30 volumes respectively to 2014. He also illustrated a series by George Edward Stanley.