This is a long shot however I’m keen to find an old book I read as a teenager. This book will have been written before the 1990’s.
All I can remember is that the protagonist is an epileptic and suffers from Petit Mal and Grand Mal seizures.
Strange/supernatural things happen when he has a seizure. I seem to remember that it was set in a university town (either UK or US). The ending centers around a house with a basement (I think!)
He rides a bicycle and may be a doctor or psychiatrist. The version I read had a white cover.
“When Johnny Smith (Christopher Walken) awakens from a coma caused by a car accident, he finds that years have passed, and he now has psychic abilities. Heartbroken that his girlfriend (Brooke Adams) has moved on with her life, Johnny also must contend with his unsettling powers, which allow him to see a person’s future with a mere touch. After shaking the hand of aspiring politician Greg Stillson (Martin Sheen), Johnny sees the danger presented by the candidate’s rise and resolves to kill him.”
Any chance the main characters were all a bunch of semi-immortal people who became immortal when they had a life-threatening accident during the middle of a seizure? Not remembering the name of the author, but it was serialized in one of the magazines…
I kinda remember a novel whose protagonist could hear other people’s thoughts. He couldn’t tune them out, though, so he had to isolate himself to get any peace and quiet. He made his living by writing college papers for jocks.