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.
I have finally found my people. Ok, but I’m on my second read through of the series. I’m VERY impatiently awaiting book 10 to be released. Has anyone else read any of the spin off series? I have thought about reading the Lord John series/novella.
Oh! You’re my people too!! I absolutely do NOT have time to reply right now, but I will. If I haven’t in the next day or so, remind me.