Detective novel, set possibly in England, name Jonah is very important, the main character is a burn victim

I read a book a while back and would love to read it again. There is a man having very painful skin grafts due to burns, there is a series of murders linked to him somehow despite the fact he can't leave hospital and the detective/someone linked to the investigation is a sculpture, she sculpts him and they fall in love iirc. The name Jonah is really important, not sure if it's the main characters name though.