Mary Pope Osborne and Natalie Pope Boyce Written Mary Pope Osborne and Natalie Pope Boyce by Mary Pope Osborne and Natalie Pope Boyce Mary Pope Osborne and Natalie Pope Boyce Mary Pope Osborne, Natalie Pope Boyce Will Osborne and Mary Pope Osborne Written by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Isidre Mones. by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Isidre Monoz. by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca. by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari.