Murder at the Regency — Kenna McKinnon

In the third book in Kenna McKinnon's 'Annie Hansen Mysteries', Annie and her partner, Mark Snow, investigate the murder of Mark's aunt Clarise, after she's found dead in the lobby of their apartment building. Several people have seen Clarise before her death, but none of them seem to have a motive. A contract killer, a charity scam and a shady boyfriend all seem to be connected to the case. But who wanted to kill Clarise, and why? Annie's schizophrenic episodes are both alarming and charming, and Mark is there to support her all the way. Sleuthing their way through the mystery with intelligence and wit, the duo is determined to find out the truth and bring Clarise's killer to justice.