Blood Work by Michael Connelly

 FBI profiler, Terry McCaleb was forced to retire due to a bad heart. After being on a transplant list, he has a successful transplant and is on the road to recovery. Weeks later, as he is healing, he is approached by a woman who claims to be the sister of the woman whose heart now resides in Terry’s chest. The woman who had been murdered in a convenience store robbery. The sister convinces Terry to look into the case as the L.A. Police seem to have set it aside as a cold case.

This starts a high-speed case of a killer who is always one step ahead of Terry. The reason behind the killings will blow the reader away. I guessed at the killer’s identity, but for all the wrong reasons. 

Very satisfying read!