As a time junkie a 70's oldie but a goodie is Dahlgren. After an accident Time moves in loopy circles so electronic signals can’t reach the city, cutting it off from the outside world. To borrow a phrase from the book, Dhalgren “has more to say than vocabulary and syntax can bear”; written in a circular structure, it’s a novel with multiple entry points, which will bend your brain. I'm not good with names so i had to look up samual Delaney.
The only sci fi writer I met was Douglas Adams.