Robin Wayne Bailey 
Skull Gate [EPUB ebook] 

From the acclaimed fantasy author: The Saga of Frost trilogy continues with the sword-wielding heroine taking on the creatures of the underworld. The fierce swordfighter Frost has lost her supernatural powers and must travel to the pit of hell and back in order to save herself and the kingdom. Doing battle with all the forces of Hades: demons, sorcerers, vicious spiders, and the most vile of all beasts, Frost must quest to save the princess and the world to which both are accustomed before evil is left to dominate for all eternity. Even without her amazing powers, Frost and her trusty sword are always ready to raze Hell.