Merlin's Rings

Sylvia Gonzalez, a 21-year-old Los Angeles college student and fencing enthusiast, is indirectly given two rings from Ilana, the modern-day heir of the ancient magician Merlin. When worn, the rings turn any door into a gate to Tokzor, a parallel world. As in Merlin’s time, Tokzor is again ruled by the cruel chitin-skinned Gorkalets, this time under Lord Vislan, who has seized control from a democratic council and enslaved the other two humanoid races of Tokzor, the Rells and the Arlanis. Vislan has a connection with the force of Evil and is becoming steadily stronger. Sylvia has, unbeknownst to her, been chosen to stop the evil. She and April Chang, her best friend, fellow student, and fencing partner, go to Tokzor and find themselves fighting the Gorkalets.