| The Great Quillow (Short Story) ( With: James Thurber) | 1944 |
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| The Baby Beebee Bird (Short Story) ( With: Diane Redfield Massie) | 1963 |
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| Martha Matilda O'Toole | 1969 |
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| Mrs. Purdy's Children | 1970 |
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| The Wicked Kings of Bloon | 1970 |
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| Can I Keep Him? (Short Story) | 1971 |
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| Won't Somebody Play with Me? (Short Story) | 1972 |
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| The castles Of The Two Brothers ( With: Aileen Friedman) | 1972 |
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| The Island of the Skog (Short Story) | 1973 |
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| Abby (Short Story) ( With: Jeannette Franklin Caines) | 1973 |
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| Mister Rogers' Songbook ( With: Fred Rogers) | 1973 |
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| Kisses and Fishes (Short Story) ( With: Liesel Moak Skorpen) | 1974 |
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| The Missing Mitten Mystery (Short Story) | 1974 |
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| There Was an Old Woman Who Swallowed a Fly (Short Story) | 1974 |
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| The Mystery of The Missing Red Mitten (Short Story) | 1974 |
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| There Was an Old Woman | 1974 |
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| Best Friends (Short Story) | 1975 |
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| The Boy Who Was Followed Home (Short Story) ( With: Margaret Mahy) | 1975 |
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| The Great Christmas Kidnapping Caper (Short Story) ( With: Jean Van Leeuwen) | 1975 |
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| The Smartest Bear and His Brother Oliver (Short Story) | 1975 |
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| How the Witch Got Alf (Short Story) ( With: Cora Annett) | 1975 |
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| You Ought to See Herbert's House | 1975 |
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| Much Bigger Than Martin (Short Story) | 1976 |
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| The Most Delicious Camping Trip Ever ( With: Alice Bach) | 1976 |
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| Awful Alexander ( With: Judith Choate) | 1976 |
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| Mysterious Ostergeest (Short Story) | 1977 |
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| Barney Bipple's Magic Dandelions (Short Story) ( With: Carol Chapman) | 1977 |
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| The Mysterious Tadpole (Short Story) | 1977 |
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| Grouchy Uncle Otto (Short Story) ( With: Alice Bach) | 1977 |
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| The Mystery Beast of Ostergeest (Short Story) | 1977 |
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| Emu and the Three Little Pigs (Short Story) | 1977 |
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| Mystery of the Magic Green (Short Story) | 1978 |
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| Millicent the Magnificent (Short Story) ( With: Alice Bach) | 1978 |
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| The Pickle Plan (Short Story) ( With: Marilyn Singer) | 1978 |
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| Molly Moves Out ( With: Susan Pearson) | 1979 |
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| Once Said Darlene (Short Story) ( With: William Sleator) | 1979 |
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| Jill the Pill (Short Story) ( With: Julia Castiglia) | 1979 |
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| There's an Elephant in the Garage (Short Story) | 1979 |
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| The Mystery of the Flying Orange Pumpkin (Short Story) | 1980 |
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| Leo, Zack, and Emmie ( With: Amy Ehrlich) | 1981 |
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| Uproar on Hollercat Hill (Short Story) | 1981 |
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| The Mystery of the Stolen Blue Paint (Short Story) | 1982 |
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| A Change of Plans ( With: Alan Benjamin) | 1982 |
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| The Ten-Alarm Camp-Out (Short Story) ( With: Cathy Warren) | 1983 |
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| The Orchard Cat (Short Story) | 1983 |
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| Ralph's Secret Weapon (Short Story) | 1983 |
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| A, My Name Is Alice ( With: Jane Bayer) | 1984 |
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| Chicken Little (Short Story) | 1985 |
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| How Much Is a Million? (Short Story) ( With: David M. Schwartz) | 1985 |
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| Iva Dunnit and the Big Wind ( With: Carol Purdy) | 1985 |
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| Leo, Zack, and Emmie Together Again ( With: Amy Ehrlich) | 1987 |
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| Paul Bunyan | 1987 |
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| Aster Aardvark's Alphabet Adventures (Short Story) | 1987 |
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| Tom Zack and Emmie in Winter ( With: Amy Ehrlich) | 1987 |
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| Is Your Mama a Llama? (Short Story) ( With: Deborah Guarino) | 1989 |
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| Yankee Doodle (Short Story) | 1989 |
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| Engelbert the Elephant (Short Story) ( With: Tom Paxton) | 1990 |
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| The Day the Goose Got Loose (Short Story) ( With: Reeve Lindbergh) | 1990 |
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| Jack and the Beanstalk (Short Story) | 1991 |
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| The Christmas Witch (Short Story) | 1992 |
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| The Wizard Next Door (Short Story) ( With: Peter Glassman) | 1993 |
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| Parents in the Pigpen, Pigs in the Tub ( With: Amy Ehrlich) | 1993 |
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| The Rattlebang Picnic (Short Story) ( With: Margaret Mahy) | 1994 |
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| Short Vowels: Beginning Reading: Book 2 ( With: Jo Ellen Moore) | 1995 |
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| Snuffles and Snouts: Poems (Short Story) ( With: Laura Robb) | 1995 |
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| Frogs Jump: A Counting Book (Short Story) ( With: Alan Brooks) | 1996 |
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| The Three Little Pigs (Short Story) | 1997 |
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| A-Hunting We Will Go! (Short Story) | 1998 |
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| The Three Sillies (Short Story) | 1999 |
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| Give the Dog a Bone (Short Story) | 2000 |
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| Big Bear Ball (Short Story) | 2002 |
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| Clorinda (Short Story) ( With: Robert Kinerk) | 2003 |
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| Santa Claus Is Comin' to Town (Short Story) ( With: J. Fred Coots, Haven Gillespie) | 2004 |
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| The Invisible Moose (Short Story) ( With: Dennis Haseley) | 2006 |
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| Clorinda Takes Flight (Short Story) ( With: Robert Kinerk) | 2007 |
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| The Pied Piper's Magic (Short Story) | 2009 |
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| Clorinda Plays Baseball! (Short Story) ( With: Robert Kinerk) | 2012 |
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| Farty Marty (Short Story) ( With: B.J. Ward) | 2013 |
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| The Green Bath (Short Story) ( With: Margaret Mahy) | 2013 |
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