Fiction Story About Massive Fraud: A Conspiracy Of Eductive Accounting Manager

The author brings forth a science fiction novel fleshed out with time travel and thrills en masse. Time travel is hard to write seamlessly but I thoroughly enjoyed the way this scribe pulled it off. The plotline - down and out writer is offered the deal of a lifetime to write one book for one man, but he is given no further information to help him make his decision. His choice plunges him into an adventure full of thrills via time travel to re-do some key moments in his life. That's a relatively brilliant hook for a novel, in my opinion. I mean who among us hasn't wished we could go back and make a different decision or choice in our lives? An actual do-over, what would you change.