Series

Buffyverse

• Visitors (1999) (with Laura Anne Gilman)
• Deep Water (2000) (with Laura Anne Gilman)

Find Your Fate Junior Transformers

9. The Invisibility Factor (1986)

Bardic Choices (with Mercedes Lackey)

1. A Cast of Corbies (1994)

Prince of the Sidhe

1. The Shattered Oath (1995)2. Forging the Runes (1996)

Novels

• Golden Girl and the Crystal of Doom (1986)
• The Shining Falcon (1989) -- based on the Russian fairy tale The Feather of Finist the Falcon
• The Horse of Flame (1990)
• Child of Faerie, Child of Earth (1992)
• A Strange and Ancient Name (1992)
• Windleaf (1993)
• Gleaming Bright (1994)
• King's Son, Magic's Son (1994) -- based on the Child ballad King Estmere
• Son of Darkness (1998)
• Barrel Racing (2000)
• Bull Riding'(2000)

Series contributed to

• Secret of the Unicorn Queen
• Swept Away! (1988)
• The Dark Gods (1989)
• Swept Away / Sun Blind (2004) (with Gwen Hansen)

Bard's Tale

• 1. Castle of Deception (1992) (with Mercedes Lackey)
• 4. The Chaos Gate (1994)

Star Trek (with Susan M Shwartz)

• Vulcan's Forge (1997)
• Vulcan's Heart (1999)
• Exodus: Vulcan's Soul Book One (2004)
• Exiles: Vulcan's Soul Trilogy Book Two (2006)
• Epiphany: Vulcan's Soul Trilogy Book Three (2007)

Highlander

• The Captive Soul (1998)
• Mage Knight
• 4. The Black Thorn Gambit (2004)
• Gene Roddenberry's Andromeda
• 4. Through the Looking Glass (2005)

Anthologies edited

• A Sampler of Jewish-American Folklore (1992)
• Rachel the Clever: And Other Jewish Folktales (1993)
• Orphans of the Night (1995)
• In Celebration of Lammas Night (1995)
• Trickster Tales: Forty Folk Stories from Around the World (1996)
• Lammas Night (1996) (with Mercedes Lackey)
• Merlin's Kin: World Tales of the Heroic Magician (1998)
• Told Tales: Nine Folktales from Around the World (1999)
• Magic Hoofbeats: Fabulous Horse Tales (2004)
• Young Warriors: Stories Of Strength (2005) (with Tamora Pierce)

Non fiction

• Indian Tribes of North America (1986)
• Greasy Grimy Gopher Guts: The Subversive Folklore of Childhood (1995) (with T K F Weisskopf)
• The First Americans: Spirit of the Land and the People (1996)
• Xena: All I Need to Know I Learned from the Warrior Princess (1998)
• Artificial Intelligence (2000) (with Robert L Perry)
• Build Your Own Website (2000) (with Robert L Perry)
• Multimedia Magic (2000) (with Robert L Perry)
• Personal Computer Communications (2000) (with Robert L Perry)
• Bill Gates: Computer King (2000)
• Jeff Bezos: King of Amazon (2001)
• Larry Ellison: Sheer Nerve (2001) (with Daniel Ehrenhaft)
• The Ear: Learning How We Hear (2001)
• The Upper Limbs: Learning about How We Use Our Arms, Elbows, Forearms, and Hands (2001)
• Samuel de Champlain: Explorer of the Great Lakes Region and Founder of Quebec (2002)
• Henry Hudson: English Explorer of the Northwest Passage (2002)
• Mythology for Storytellers (2002)
• Competitive Soccer for Girls (2002)
• Deep Space Observation Satellites (2003)
• The History of the Internet (2003)
• The History of the Personal Computer (2003)
• Internet Safety (2003)
• Flakes and Flurries: A Book about Snow (2003)
• Gusts and Gales: A Book about Wind (2003)
• Nature's Fireworks: A Book about Lightning (2003)
• Splish Splash!: A Book about Rain (2003)
• Sunshine: A Book about Sunlight (2003)
• Shapes in the Sky: A Book about Clouds (2003)
• The Cold War (2003)
• Your Travel Guide to Ancient China (2003)
• Your Travel Guide to Ancient Israel (2003)
• Geothermal Power (2003)
• Hydroelectric Power (2003)
• Nuclear Power (2003)
• Solar Power (2003)
• Wind Power (2003)
• It's a Www. World (2004)
• Fossil Fuel Power (2004)
• Queen Lydia Liliuokalani, Last Ruler of Hawaii (2004)

Anthologies contribution

• First Contact (1987)
• Alternate Warriors (1993)
• Alien Pregnant by Elvis (1994)
• Weird Tales from Shakespeare (1994
• Witch Fantastic (1994)
• Xanadu 3 (1994)
• Chicks in Chainmail (1995)
• Sherlock Holmes in Orbit (1995)
• Superheroes (1995)
• Don't Forget Your Spacesuit, Dear (1996)
• Future Net (1996)
• Otherwere (1996)
• The Shimmering Door (1996)
• Space Opera (1996)
• Elf Magic (1997)
• Return of the Dinosaurs (1997)
• Wizard Fantastic (1997)
• Zodiac Fantastic (1997)
• Black Cats and Broken Mirrors (1998)
• Chicks 'n Chained Males (1999)
• Children of the Night (1999)
• Flights of Fantasy (1999)
• Twice Upon a Time (1999)
• Civil War Fantastic (2000)
• Guardsmen of Tomorrow (2000)
• Perchance to Dream (2000)

Short stories

• The Magic-stealer (1991)
• Monsieur Verne and the Martian Invasion (1993)
• Ancient Magics, Ancient Hope (1994)
• The Defender of Central Park (1994)
• Racehorse Predicts the Future! (1994)
• The Case of the Purloined L'Isitek (1995)
• Old Woman Who Created Life (1995)
• Teacher's Pet (1995)
• The Coyote Virus (1996)
• I've Got the Horse, Right Here (1996)
• Mother Knows Best (1996)
• One Late Night, with Jackal (1996)
• A Song of Strange Revenge (1996)
• Fangs for the Memory (1997)
• A Game of Mehen (1997)
• Ilian (1997)
• Netted (1997)
• Wild Hope (1997)
• The Cat Who Wasn't Black (1998)
• Feeding Frenzy Or the Further Adventures of the Frog Prince (1999)
• A Question of Faith (1999)
• Shiftless (1999)
• The Dreams That Stuff Is Made of (2000)
• Images (2000)
• The Silver Flame (2000)
• Witch-Horse

Television

The Adventures of the Galaxy Rangers (1986)