
The Loners (1972)
Annie on My Mind (1982)
Peace, O River (1986)
Lark in the Morning (1991)
Dove and Sword: A Novel of Joan of Arc (1995)
Good Moon Rising (1996)
The Year They Burned the Books (1999)
Holly's Secret (2000)
Meeting Melanie (2002)
Endgame (2006)

What Happened in Marston? (1971)
Maria's Mountain (1981)
Fours Crossing (1981)
Favorite Tales from Grimm (1982)
Watersmeet (1983)
Prisoner of Vampires (1984)
The Door Between (1987)
Case # 1: Mystery of the Night Raiders (1987)
Case # 2: Mystery of the Midnight Menace (1988)
Case # 3: Mystery of the Secret Marks (1989)
My Sister the Vampire (1992)
Case # 4: Mystery of the Kidnapped Kidnapper (1994)
My Brother the Werewolf (1995)
Case # 5: Mystery of the Watchful Witches (1995)
The Case of the Stolen Scarab (2003)
Molly's Family (2004)

Berlin: City Split in Two (1971)

Vampires (1973)
Wherewolves (1973)
Witches (1975)
Devils and Demons (1976)
Fun With Weather Forecasting (1977)
The Kid's Code and Cipher Book (1981)

The Secret of Smith's Hill (1999)

Nora & Liz (2002)

Parents' Night (1994)
Loving Megan (2002)
Hear Us Out: Lesbian and Gay Stories of Struggle, Progress, and Hope, 1950 to the Present (2007)

Gay Books for Teens & Kids: Coming into Their Own? (2001)

Annie on My Mind (1988)
Unfinished Journey: Books for the Next Generation (1991)
Dick and Jane Grow Up Gay: The Importance of (YA) Fiction (1992)
Banned: Lesbian and Gay Kids' Books Under Fire (1994)
Gay Youth Book Boom (1994)
Annie on Trial: How It Feels to Be an Author of a Challenged Book (1995)
Annie on Trial: How It Feels to Be an Author of a Challenged Book (1996)
Censorship Update! A Report from Nancy Garden (1996)
Gay Fiction for Kids: Is Anyone Out There Publishing It? (1997)
A Writer's Perspective on Censorship (2000)
Writing for the Invisible Reader (2000)
Foreword (2000)
An Imaginary Interview on the Delicate Subject of a Moral Approach to Writing Children's Books (Based on Arguments Raised in Real Life) (2001)
Dear Teachers (2001)
Writing About Gay and Lesbian Characters in a Changing World (2005)

2000 Robert B. Downs Intellectual Freedom Award from the Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign
Margaret A. Edwards Award for Lifetime Achievement (2003)
Katahdin Award, Maine Library Association (2005)
Saints and Sinners Hall of Fame Inductee (2007)