Anthology containing:

The Oathbound
Oathbreakers
Oathblood

The Oathbound: Introduces Tarma--swordswoman trained by elite warriors in all forms of deadly combat--and Kethry, former noblewoman whose magical skills were shaped by a powerful school of sorcery. United by the Goddess and armed with a magical sword drawing them to those in need, Tarma and Kethry swore a blood oath to fight against evil.

Oathbreakers: When Idra, leader of the Sunhawk mercenaries, failed to return from a journey to her home kingdom of Rethwellan, Tarma and Kethry set out in search of her. Instead they find a land shadowed by a dark enchantment, the claim to the throne in question, and the people of Rethwellan in terrible jeopardy.

Oathblood: The sisters of sword and spell have pledged to train others to fight for their cause, starting a school for fledgling warriors and mages. But training turns out to be far more perilous than expected--and when two of their students are kidnapped, Tarma and Kethry must draw upon their combined skills to answer the call of destiny in ways they never imagined.