Dirk Gently's Holistic Detective Agency is a little unusual as far as time-travel stories go in that it explicitly allows paradox to remain both remembered and unexplained/unexplainable (or so Reg tells us). Sure, paradox is labelled as such because it can't be fully resolved, but most garden-variety time-travel stories attempt to wrap things up cleanly as far as possible, either by wiping memories or forming self-contained loops in which everything happens because everything else happened.
If you like the time-travel genre (I don't, particularly, but liked this), you might want to try The Psychology of Time Travel by Kate Mascarenhas. I found it a fairly original take on travel travel, and it struck me as realistic in a way that time-travel stories rarely are. It's a science-fiction/alternative-history story mostly framed around a murder mystery.
For a person that doesn't go out of their way for time-travel stories I seem to have stumbled over a few interesting ones in recent times. Just a week or so ago I read a short story called Thought Experiment by Eileen Gunn (2011) that had a very neat twist in the tail (I read it in a collection called Eclipse Four, edited by Jonathan Strahan, but probably available elsewhere too). Besides having read this recently, I also think it sprang into mind because it was the sort of twist I would have loved to have found with Dirk Gently (clever, obvious in retrospect, and wryly funny).
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