Katharine Kerr

She is my favourite author (yes, I think even maybe a tiny bit better than JRR Tolkien... but perhaps only because she writes series and not singles.

The Deverry Cycle:

Daggerspell

Darkspell

Dawnspell

Dragonspell

The Westlands Cycle:

A Time of Exile

A Time of Omens

A Time of War

A Time of Justice

The Dragon Mage Cycle:

The Red Wyvern

The Black Raven

The Fire Dragon

Note: These last two are not out in print yet (and, consequently, I have not read them of course!)

The Silver Wyrm

The Gold Falcon