The Mage Wars
The Black Gryphon
The White Gryphon
The Silver Gryphon

The Last Herald Mage Trilogy
Magic's Pawn
Magic's Promise
Magic's Price

Brightly Burning

Vows & Honor
The Oathbound
Oathbreakers
Oathblood

Exile's Honor
Exile's Valor

Take a Thief

Kerowyn's Tale
By the Sword

The Mage Winds Trilogy
Winds of Fate
Winds of Change
Winds of Fury

The Mage Storms Trilogy
Storm Warning
Storm Rising
Storm Breaking

Owlflight
Owlsight
Owlknight

Heralds of Valdemar
Arrow of the Queen
Arrow's Flight
Arrow's Fall

Vows & Honor
The Oathbound
Oathbreakers

The Last Herald Mage Trilogy
Magic's Pawn
Magic's Promise
Magic's Price

The Mage Winds Trilogy
Winds of Fate
Winds of Change
Winds of Fury

Kerowyn's Tale
By the Sword

Oathblood

The Mage Storms Trilogy
Storm Warning
Storm Rising
Storm Breaking

Owlflight
Owlsight
Owlknight
Brightly Burning

Take a Thief

Exile's Honor
Exile's Valor

Halfblood Chronicles
(with Andre Norton)
The Elvenbane
Elvenblood 
Elvenborn
Elvenbred