Replay by Ken Grimwood
This qualifies as an alternate history because the man time travels back in time and alters in own life path over and over again in a 25 year period.
A man dies of a heart attack in Oct 1988, and wakes up in 1963. He uses the kentucky derby to start with some money then goes to vegas, then builds a stock market empire. That's all well and good, but 1988 roles around again, he dies of a heart attack again and wakes up in 1963 again.
Each time, he creates an alternate history.
The movie Groundhog's Day was inspired by this book says a reporter.
If you google Replay by Ken Grimwood, you will find that it is very true
that many people including myself, read the 250 page book in ONE read.
Because it is book, you literally don't put down until u find out how it ends.