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.
Dirk Gently’s Holistic Detective Agency by Douglas Adams.
“The first ever fully realized detective-ghost-horror-who dunnit-time travel-romantic-musical-comedy-epic.”
I suggest reading it twice, it’s all there the first time, you just didn’t notice.
I love books you have to read twice! It makes me feel stupid, but in a good way.
The reveal about the magic trick completely blew my mind the first time- because of the sheer scope involved for something so small and silly and human. Like, if you really can travel in time, of course you’d treat it as frivolously as that- and of course you’d end up causing crazy ripple effects as a result.