A necessary evil - Alex Kava (Maggie O'Dell #5)

Someone is KILLING Catholic priests

FBI profiler Maggie O’Dell is brought in to investigate the killing spree and it soon becomes clear to her that more than one perpetrator is responsible. The gruesome murders leave the public reeling. Then O’Dell gets a lead that leaves her stunned.

For years she has been hunting Father Keller, the monster whose acts of brutality continue to haunt her. When he offers to help Maggie solve the crimes, she has no choice but to ally herself with the elusive child killer, crossing a dangerous line into a world from which she may not return unscathed.

Maggie knows the bargain is A NECESSARY EVIL...one that may be made in blood...