Living in Threes
Judith Tarr
War World VII: Blood Vengeance
Jerry Pournelle & S. M. Stirling & Judith Tarr & Susan Shwartz & Harry Turtledove
Household Gods
Judith Tarr & Harry Turtledove
Lord of the Two Lands
War World VI: Blood Feuds
Alamut
Alamut (1)
Ars Magica