The Jeremy Moon series
Moon Dreams (1988)
Nul's Quest (1989)
Wizard's Mole (1990)

By John Bellairs, completed by Brad Strickland
The Ghost in the Mirror (1993)
The Vengeance of the Witch-Finder (1993)
The Drum, the Doll, and the Zombie (1994)
The Doom of the Haunted Opera (1995)

By Brad Strickland; based on characters created by John Bellairs
The Hand of the Necromancer (1996)
The Bell, the Book, and the Spellbinder (1997)
The Specter from the Magician's Museum (1998)
The Wrath of the Grinning Ghost (1999)
The Beast under the Wizard's Bridge (2000)
The Tower at the End of the World (2001)
The Whistle, the Grave, and the Ghost (2003)
The House where Nobody Lived (2006)

Star Trek: Deep Space 9 Universe
The Star Ghost (1994)
Stowaways (1994)

Are You Afraid of the Dark? series; written with Barbara Strickland
The Tale of the Secret Mirror (1995)
The Tale of the Phantom School Bus (1996)
The Tale of the Deadly Diary (1996)

Star Trek: Starfleet Academy Universe; written with Barbara Strickland
Starfall (1996)
Nova Command (1996)
Crisis on Vulcan (1996)

Wishbone series
Be a Wolf! (1997)
Salty Dog (1997)
Robinhound Crusoe (1997)
The Treasure of Skeleton Reef (1997)
Tail of Terror (1998) (with Thomas E. Fuller)
Gullifur's Travels (1999) (with Barbara Strickland)
The Wishbone High Seas Adventure (2000)

Wishbone Mysteries
The Treasure of Skeleton Reef (1997)
The Riddle of the Wayward Books (1997) (with Thomas E. Fuller)
Drive-In of Doom (1998) (with Thomas E. Fuller)
The Disappearing Dinosaurs (1998) (with Thomas E. Fuller)
The Disoriented Express (1998) (with Thomas E. Fuller)

Wishbone: the Early Years
Jack and the Beanstalk (1999) (with Thomas E. Fuller)
Terrier of the Lost Mines (1999) (with Thomas E. Fuller)
Aladdin (2001) (with Thomas E. Fuller)

Sabrina the Teenaged Witch: Salem's Tales Series
You're History! (1998) w/ Barbara Strickland

Mystery Files of Shelby Woo Series
Frame-Up! (1998) (with Barbara Strickland)
Man Overboard! (1999) (with Barbara Strickland)

Foreward by Brad Strickland
The Pedant and the Shuffly, reprint (2001) (by John Bellairs)

Full House Sisters 12: No Rules Weekend (2001) (with Barbara Strickland)
Survive! [Dinotopia #13] (2001)

Pirate Hunter (with Thomas E Fuller)
Mutiny (2002)
The Guns of Tortuga (2003)
Heart of Steele (2003)

Mars Year One (with Thomas E Fuller)
Marooned! (2004)
Missing (2004)
Marsquake! (2005)

Grimoire
Curse of the Midions (2006)
Tracked by Terror (2007)