* Das Geschenk, 1982, Crowell
* The Gift at Christmas, 1983, Crowell
* All-of-a-Kind Family, 1985, Harper &Row
* All-of-a-Kind Baby Sitter, 1986, Harper &Row
* Das Geheimnis von Gumbo Grove, 1992, Clarion
* Die Nacht, in der ich zu Hause blieb, 1994, Orchard
* Horace und Morris (aber hauptsächlich Horace), 1995, Clarion
* Morris und Joan (aber hauptsächlich Morris), 1996, Clarion
* Das Ding am Fußende des Bettes und andere gruselige Geschichten, 1997, Chronicle Books
* Horace und Morris Go Swimming (aber hauptsächlich Morris), 1998, Clarion
* Horace und Morris Go Camping (aber hauptsächlich Horace), 2000, Houghton
* Ich wünschte, ich wäre ein Hund, 2002, Roaring Brook Press
* Wohin geht der Braunbär?, 2003, Clarion
* The Thing from Another World (and Other Scary Tales), 2003, Chronicle Books
* Gibt es Platz für einen Elch?, 2005, Clarion
* The Thing About Yetis (and Other Scary Tales), 2005, Chronicle Books
* The Thing About Mommies (and Other Stories for Mothers and Sons), 2006, Chronicle Books
* Wo ist mein Teddy?, 2006, Clarion
* Horace und Morris Go to New York (But Mostly Morris), 2007, Clarion
* Du bist alles, was ich brauche, um durchzukommen, 2008, Schwartz &Wade
* The Thing AboutDaddies (and Other Stories for Fathers and Daughters), 2010, Chronicle Books
* Mein kleiner roter Wagen, 2012, Clarion Books
* Frohes neues Jahr, Curious George!, 2014, Houghton Mifflin Books for Children
* Gute Nacht, neugieriger George!, 2015, Houghton Mifflin Books for Children
* Wo bist du, Braunbär?, 2016, Houghton Mifflin Books for Children
* Es ist Halloween, Curious George!, 2017, Houghton Mifflin Books for Children
* Curious George Goes to the Beach!, 2018, Houghton Mifflin Books for Children
* Curious George's Nutty Adventure, 2019, Houghton Mifflin Books for Children
* Busy Busy Busy, 2020, Roaring Brook Press
* There's a Tiger in the Garden, 2022, Roaring Brook Press
Fiktion
* The Shadow Within, 1981, Atheneum
* The Gift-Giver, 1982, Clarion
* Aus den Schatten, 1984, Clarion
* Which Way Freedom?, 1986, Clarion
* The Gift-Giver, 1987, Bantam Doubleday Dell Yearling (Jugend)
* Out of the Shadows, 1987, Bantam Doubleday Dell Yearling (Jugend)
* The Gift, 1992, Bantam Doubleday Dell (Jugend)
* Which Way Freedom, 1992, Bantam Doubleday Dell Yearling (Jugend)
* Kein Ausweg, 1994, Viking
* The Gift, 2000, Bantam Doubleday Dell Anchor (junger Erwachsener)
* Out from the Shadows, 2001, Bantam Doubleday Dell Anchor (junger Erwachsener)
* Which Way Freedom, 2001, Bantam Doubleday Dell Anchor (junger Erwachsener)
* The Trouble with Magnets, 1998, Yearling
* The Big Bike Ride, 2000, Yearling
* Der Fall des fehlenden Dinosaurierknochens, 2001, Sterling
* Der Fall der gestohlenen Baseballkarten, 2002, Sterling
* Der Fall des nervösen Nachrichtensprechers, 2003, Sterling
* The Case of the Copier Caper, 2004, Sterling
Sachbücher
* Good-Bye, Vietnam, 1982, Lerner Publications
* Der schwarze Tod, 1984, Lerner Publications
* The History of American Indians, 1990, Scholastic
* The Children of Colonial America, 1991, Scholastic
* Der Wilde Westen, 1993, Scholastic
* Das erste Erntedankfest der Pilger, 1994, Scholastic
* Der Bürgerkrieg, 1995, Scholastic
* The Women's Suffrage Movement, 1996, Scholastic
* The World War II Home Front, 1997, Scholastic
* The Underground Railroad, 1998, Simon &Schuster
* Die neue Welt, 1999, Scholastic
* The New United States, 2000, Scholastic
* The Young United States, 2001, Scholastic
* The Mighty American Revolution, 2002, Scholastic
* The Mighty Age of Discovery, 2003, Scholastic
* The Mighty American West, 2004, Scholastic
* Das mächtige Mittelalter, 2005, Scholastic
* The Mighty Roman Empire, 2006, Scholastic
* The Mighty American Civil War, 2007, Scholastic
* The Mighty Ancient Egypt, 2008, Scholastic
* The Mighty Dinosaur Age, 2009, Scholastic
* The Mighty World War II, 2010, Scholastic
* The Mighty Explorers &Discoverers, 2011, Scholastic
* The Mighty Space Era, 2012, Scholastic
* The Oregon Trail, 2015, Scholastic
* Pilger, 2017, Scholastic
* Alexander Hamilton, 2020, Scholastic
* Harriet Tubman, 2021, Scholastic
* The Underground Railroad, 2021, Scholastic
Biografien
* Emily Dickinson, 2002, Clarion
* Charles Lindbergh, 2003, Clarion
* Helen Keller, 2004, Clarion
* Eleanor Roosevelt, 2005, Clarion
* George Washington Carver, 2006, Clarion
* Thomas Edison, 2007, Clarion
* Henry Ford, 2008, Clarion
* Amelia Earhart, 2009, Clarion
* Jackie Robinson, 2010, Clarion
* Albert Einstein, 2011, Clarion
* Rosa Parks, 2012, Clarion
Fiktion (unter dem Pseudonym J.L. Marlow)
* The Shadow Brothers #1:Danger at Shadow Canyon, 1990, Archway Books
* The Shadow Brothers #2:The Haunted Swamp, 1990, Archway Books
* The Shadow Brothers #3:Lost in the Everglades, 1990, Archway Books
* The Shadow Brothers #4:The Mysterious Cave, 1990, Archway Books
* The Shadow Brothers #5:The Forbidden Island, 1990, Archway Books
* The Shadow Brothers #6:The Ghost Town, 1991, Archway Books
* The Shadow Brothers #7:The Hidden City, 1991, Archway Books
* The Shadow Brothers #8:The Secret of Shadow Island, 1991, Archway Books
* The Shadow Brothers #9:The Legend of the Golden Warrior, 1991, Archway Books
* The Shadow Brothers #10:The Battle for Shadow Mountain, 1991, Archway Books
* The Shadow Brothers #11:The Return of the Shadow Brothers, 1992, Archway Books
* The Shadow Brothers #12:The Day of the Shadow Brothers, 1992, Archway Books