LIfeguard: James Patterson

This was a book in the "Ned Kelly" series. Ned, who is characterized as a bit of a loser loses 4 friends and a girlfriend when a robbery attempt goes sour. Ned and his buddies were slipped a tip about some expensive art and went to steal it. Only someone beat them to the loot. Before he gets back to the meet up place his friends are all murdered. His girlfriend is a supposedly unrelated spree is killed in a hotel. He lives on the run while trying to piece together what happened. In the end the man who was "robbed" from had sold the paintings because his wife had set up the theft to get even with him, the man was also evidently sleeping with a prostitute, Ned's girlfriend, which is why she was killed.