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.
Came here to say The Gone World. I love how the time travel works in that book (spoilers) >!You can travel forward any length of time, but only ever return to the moment you departed (i.e. you can never travel back in time from your “present”). When you travel forward, you create a “branch” reality in which you were absent/missing for whatever span of time you jump forward. The branch ceases to exist when you return to the present, since you return to living in the present and affecting events. This leads to some people who are aware of time travel trying to imprison time travelers, to prevent their branch from being destroyed and themselves/their loved ones from “dying.” Another version of them may exist in the “main” timeline, but are they the same person? Will they meet and fall in love with the same person? Will the children they have even exist? It’s a really interesting take on time travel and causality. !<
Oh that sounds good! Putting this on my list
It was so clever and really great take on the complexity of time travel, I thought! I really liked this one.
That sounds a little bit like the Lazarus Project, a BBC TV Show.
The book is so good. It takes that hook and jumps off it into all these different angles, and the ending threat is almost Lovecraftian… I had to go back and re-read to understand what actually happened when it ended.