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.
Langoliers by Stephen king was pretty interesting. Basically if you travel into the past, because it’s the past it’s redundant and done with there are these monsters (langoliers) that eat?? reality I guess. Concept is some people on a plane accidentally fly through a time portal and then have to escape