Interesting mysterious story of a “lifer” in a mental hospital

Parker, a Psychiatrist starts his residency at a mental hospital in which one patient in particular catches his eye. A now middle aged man has been held at this hospital since he was 6 years old. There is hardly any information about him and the hospital staff seems to be scared of dealing with him so he has minimal human contact. Members of the staff do not even know the man’s real name. He is just referred to as “Joe”. I can’t wait to se where this story goes. I loved the book “The Silent Patient” and this one is described to be for fans of that and Steven King. Sounds like a fantastic read to me!