Is The Science Fiction Hall of Fame still in print? If not, a used bookstore should have copies. Volume I was a collection of short stories and novellas. If you don’t like one story, you can easily skip to another.
Some of Larry Niven’s short story collections might be a good introduction. He wrote a lot of stories set in the near future, just like our world but with one bit of far-out technology. Likewise Ray Bradbury.
How about Spider Robinson’s Melancholy Elephants? This was the short story collection that got my wife interested (at least peripherally) in SF after having been turned off by Asimov and Bradbury.
The Fuzzy Papers by H. Beam Piper, if you can find it. Sure, they’re (two books in the volume) decades old, but they’ve lasted. The technology is accessible, and the story is great.
I agree with your brother. Man that was awful. I’d go with Hitchiker’s Guide, Ray Bradbury short stories, Sirens of Titan, Ender’s Game and Ringworld. I’m not much of a SciFi fan, so I’d say all of these books are pretty accessible.
I recommend Changing-Planes by Ursula Le Guin, a collection of 16 connected short stories. The premise is a contemporary air traveler who discovers she can visit other worlds and “planes” of existence. However, Le Guin with her philosophical and anthropological bent makes each strange world somehow strangely familiar. A reviewer called it a Gulliver’s Travels for the 21st century. Funny, thought-provoking, heartbreaking and a quick read!
I just listened to Camouflage by Joe Haldeman on audio. It’s not deep or involved, but it was a good listen. It’s about a couple of shape-changers from a distant globular cluster. It made me think a little of John Carpenter’s “The Thing”, but without the horror element.
I enjoyed it. If I’d read it in paper, I’d say it was a good page turner. Not sure what the equivalent in audio is – a can’t-stop listen?
I’d like to suggest Starship Troopers by Robert A. Heinlen. Nothing to do with the movie, and it’s the first “Serious Science Fiction Book” I can remember reading. (The first “Science Fiction” book I read was The Hitch-Hiker’s Guide To The Galaxy, FWIW.)
Some of the Michael Crichton books- Jurassic Park and Sphere in particular- would also be good places to start, IMHO.