No sorrow to die - Gillian Galbraith

Heather Brodie kisses her lover good night. But back at home her disabled husband lies dead, his throat cut from ear to ear. Many people wanted Gavin Brodie dead, including Gavin Brodie. Devastated by an incurable illness he had pleaded to be allowed to die. Detective Sergeant Alice Rice investigates when another terminally ill man wakes to find someone with a knife in his bedroom. Is this just a coincidence? Or is there a serial killer on the loose with a mission to get rid of the sick? Alice has troubles of her own when she finds that her partner, Ian Melville, is lying to her.