by Harlan Coben
Myron is summoned to Paris at the behest of an old lover, Terese. She is in unspecified trouble and needs his help. When he gets there, he discovers that her husband has been murdered and she is the main suspect. The interesting thing is that more than one blood-type has been discovered at the scene - and the other blood can only be attributed to her daughter. But she died 10 years before.