Novels

The Door Into Fire (The Tale of the Five #1)

The Door Into Fire

First of the Middle Kingdoms series
So You Want To Be A Wizard (Young Wizards Book 1)

So You Want To Be A Wizard

First of the Young Wizards series
The Wounded Sky (Star Trek #13)

The Wounded Sky

Star Trek (Pocket Books) #13
My Enemy, My Ally (Star Trek: Rihannsu #1)

My Enemy, My Ally

Star Trek (Pocket Books)
The Door into Shadow

The Door Into Shadow

Second of the Middle Kingdoms series
Deep Wizardry (Young Wizards #2) Harcourt mass market pb cover

Deep Wizardry

Second of the Young Wizards series
The Romulan Way (Star Trek #35) mass market pb cover

The Romulan Way

Star Trek #35: second in the Rihannsu Sequence
Spock's World hardcover edition cover

Spock's World

The first hardcover Star Trek novel

Keeper of the City

Guardians of the Three vol. 2
High Wizardry Harcourt mmpb cover (Cliff Nielsen)

High Wizardry

Third of the Young Wizards series
Support Your Local Wizard SFBC hardcover

Support Your Local Wizard

The first Young Wizards omnibus
Space Cops: Mindblast mmpb cover

Space Cops: Mindblast

Book 1 of the Space Cops series