Falcon (illustrated by George) 1963 Red Robin, Fly Up! (picture book, photos by Ellan Young) 1964 Gull Number 737 (illustrated by George) 1964 Marvels and Mysteries of Our Animal World (Jean George editor and contributor) 1965 Spring Comes to the Ocean (illustrated by John Wilson) 1966 Hold Zero! (illustrated by George) 1967 The Moon of the Owls (The Thirteen Moons series #1, picture book illustrated by Jean Zallinger) 1967 The Moon of the Bears (The Thirteen Moons series #2, picture book illustrated by Mac Shepard) 1967 The Moon of the Salamanders (The Thirteen Moons series #3, picture book illustrated by John Kaufmann) 1967 The Moon of the Monarch Butterflies (The Thirteen Moons series #5, picture book illustrated by Murray Tinkelman) 1968 The Moon of the Fox Pups (The Thirteen Moons series #6, picture book illustrated by Kiyoaki Komoda) 1968 The Moon of the Wild Pigs (The Thirteen Moons series #7, picture book illustrated by Peter Parnall) 1968 The Moon of the Mountain Lions (The Thirteen Moons series #8, picture book illustrated by Winifred Lubell) 1968 Coyote in Manhattan (illustrated by John Kaufmann) 1969 The Moon of the Chickarees (The Thirteen Moons series #4, picture book illustrated by Don Rodell) 1969 The Moon of the Deer (The Thirteen Moons series #9, picture book illustrated by Jean Zallinger) 1969 The Moon of the Alligators (The Thirteen Moons series #10, picture book illustrated by Adrina Zanazanian) 1969 The Moon of the Gray Wolves (The Thirteen Moons series #11, picture book illustrated by Lorence Bjorklund) 1969 The Moon of the Winter Bird (The Thirteen Moons series #12, picture book illustrated by Kazue Mizumura) 1969 The Moon of the Moles (The Thirteen Moons series #13, picture book illustrated by Robert Levering) 1969 New York in Maps (listed as Toy Lasker and Jean George) 1970 Beastly Inventions: A Surprising Investigation Into Just How Smart Animals Really Are (illustrated by George) 1971 Who Really Killed Cock Robin? (Ecological Mystery #1) 1971 All Upon a Stone (picture book illustrated by Don Bolognese) 1972 Julie of the Wolves (Julie series #1, illustrated by John Schoenherr and Julek Heller in 1976) () 1972 Everglades Wildguide (Official National Park Handbook #143, illustrated by Betty Fraser) () 1974 All Upon a Sidewalk (picture book illustrated by Don Bolognese) 1975 Hook a Fish, Catch a Mountain 1976 Going to the Sun 1978 The Wentletrap Trap (picture book illustrated by Symeon Shimin) 1978 The