Questiona about title of a book about guy with uncontrolled telepathy skill

So the story goes more less like this.

There are some mathematical proofs (sci - fi ofc), that telepathy is real, exist and some people have it.

Guy is traveling around the country, he mostly drives himself, away from people. That is important that he is away from people, because he can hear their thoughts and cant stop thoughts of other invade his mind. The more people, the worse and he got headaches, etc. I dont remember what he does, I think he is reporter, but not sure, maybe investigator, detective or a scientist.

He goes to a farm, not sure what happens there, but he finds a woman who owns it and they are about to have sex. Funny thing he cant hear her thoughts, that makes him relaxed and curious, but cautious. At the last moment she is about to blow him, he reads her mind and knows she have steel teeth and wants to snap his penis. So he runs away, etc, she chase him, I think he kills her in the end, but not sure.

Eventually he meets woman who can shield his mind, they fall in love instantly etc.

She is terminally sick, not sure on what sow what he does is -> he transport their mind into mind a a child / guy who is in coma and they live together in his mind.

If anyone recons the title of this book, please tell me, I read it about 15 years ago and dont remember the title, nor author, but it was great book!