To find a dangerous grimoire, they'll have to break a few rules...and maybe their hearts. When warlock Tony Castillo picks up Cassandra Sandoval at the airport, the copper-haired witch brings his restless, aimless life into razor-sharp focus...and triggers a wince-inducing case of foot-in-mouth disease. Luckily, her cool, hazel-green gaze betrays not a flicker of answering attraction. Nope, Cassandra is all business...