"Children, parents, and teachers love the adventurous Christian Heroes: Then & Now biographies and unit study curriculum guides. Now the Heroes for Young Readers series introduces children ages 6 and up to the lives of Christian Heroes with rhyming text and vivid full-color illustrations. WWII veteran Betty Greene (1920-1997) combined her love of flying with her love for Christ by helping found the Mission Aviation Fellowship, which still uses airplanes to take the gospel around the world.