My pick would have to be the A Whole Nother Story trilogy, in which (spoiler warning) you can only travel back in time. But because time is in a loop of sorts, if you go before the beginning of time, you will be at the end of time. From there you can go back to any time you want to. And time paradoxes cannot be produced. Plus, your memories from the previous timeline exist as well as the memories from the new one.
What I like most about that novel, is when it was written. By society’s standards back then, I would imagine his ideas were pretty wild
Yup. I went into that knowing it was old. When i finished i looked it up and realized just how old it is. Blew me away. People were riding carriages then!