Tess Gerritsen - The Apprentice

He may be behind bars, but Warren Hoyt still haunts a helpless city, bequeathing his evil legacy to a student all too diligent – and all too deadly.
A year has passed since the capture of the Surgeon, serial killer Warren Hoyt, yet the memory of his brutal crimes continues to haunt Boston homicide detective Jane Rizzoli. Now she faces a new killer, a hunter who preys on well-to-do couples. For Rizzoli the death scenes have a horrifying air of familiarity, especially when she realizes that this new killer is copying one obscure element from Warren Hoyt's crimes.
A new complication arises as a federal investigator from Washington joins the case. Again and again, Rizzoli clashes with Special Agent Gabriel Dean, who shows up at every crime scene. He knows something about this killer, something so politically explosive that he cannot reveal it to her.
Then Warren Hoyt makes a brilliant and bloody escape from custody. Suddenly there is not one hunter on the loose, but two. And they are united, a pair of blood brothers who share grotesque appetites and a combined genius. They have joined forces to stalk the most challenging prey of all, the very woman who now hunts them…
Set in a stunning world where evil is easy to learn and hard to end, The Apprentice is both a terrifyingly sustained psychological thriller and an adrenalin fuelled-trip to hell that we urge you to sign up for.
First you had THE SURGEON…
Now you've got THE APPRENTICE..