Dead to the Last Drop by Cleo Coyle (Coffeehouse Mystery #15)
In Dead to the Last Drop, Cleo Coyle's fifteenth Coffeehouse Mystery, Clare Cosi is doing her best to get the Village Blend's new Washington, D.C. coffeehouse and jazz club up and running. The business gets a major boost when the President's daughter, a jazz pianist, plays at the club. But meanwhile Clare becomes the prime suspect in a murder. Then the President's daughter disappears and the authorities want to question Clare for that too. Clare has to go on the run while she tries to clear her name.