Dragon's Tooth — Kristine Kathryn Rusch

Tara, a former agent of Abracadabra Incorporated, once helped shut down black magic all over the world. She retired from that world for a quieter life of running a little magic shop. But black magic finds her anyway. On a trip to Paris, she discovers a deadly dragon's tooth. Now, she must shut down the source of its dark magic or risk losing everything. “Kristine Kathryn Rusch is one of the best writers in the field and ‘Dragon's Tooth' does not disappoint…Rusch gives us a delightful tale here!” -- SFRevu