Both of these are quick, easy reads. Don't read about the plots ahead of time.

Replay by Ken Grimwood: https://www.amazon.com/Replay-Ken-Grimwood/dp/068816112X

Illusions by Richard Bach: https://www.amazon.com/Illusions-Adventures-Reluctant-Richar...

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Bonus: Anything by Kevin Kelly. He always seemed to be over-hyped by influencers, so I avoided his work for the longest time. That was a mistake.