The Grand Vizier of Krar series by W. John Tucker.

An epic romance set in a future time. Good strives against evil, and chivalric adventure mingles with science fiction.

The free world is being overrun and a young woman is propelled into the midst of war and politics

Blancapaw ('Blan' to friends and family) has no ambition to become a power in the world, but she is forced to react to events beyond her control. She must find ways of coping with those events and then to take control of them. She is not without resources. She has a brilliant mind and a talent for invention and problem solving. She has compassion and a strong ethical code. Moreover, she has a destiny preordained.

Front cover of Grand Vizier of Krar: Strings of Destiny
Front cover of Grand Vizier of Krar: Fulcrum of Power
Front cover of Grand Vizier of Krar: Balance of Doubt