Circle of the Dead — David Lawrence

The man died of a broken heart. Literally. But what broke his heart was a sharp object shoved hard between his ribs. When they found him he was sitting in a circle with three other corpses in a London apartment. That's when Detective Stella Mooney got the case. Suffering from brutal nightmares and a fondness for too much vodka, Stella's trying to hold it together long enough to find the answers to this bizarre puzzle. But the closer she comes to cracking the case, the more her personal life seems to fall apart. From the glamorous homes of the wealthy to the decidedly tougher parts of town, Stella has to follow the evidence--even when it seems to be leading her in circles.