Sorcerer's Luck — Katharine Kerr

Secrets are Dangerous Maya Cantescu, an art student in the San Francisco Bay Area, has more secrets than she can handle. Some she keeps from herself, like her mysterious talent for sorcery. Some she knows too well, like the rare disease that threatens to kill her-or someone else. When she meets Tor Thorlaksson, a sorcerer and runemaster, he seems to offer an escape from her deadly problems. But he knows secrets about them both, and these could turn her world upside-down.