Just One Damned Thing After Another by Jodi Taylor
"I don't like time travel and I don't read much science fiction." Apparently I'm a liar. Just One Damned Thing After Another is my third science fiction-ish book of the year and deals pretty much solely with time travel and I though it was a blast.
Our historian is Madeleine Maxwell (Max) and I have to say I love her. She's smart and funny in that snarky way and she really does seem to be a bit of a disaster magnet. St Mary's is a "secret" organization that specializes in time travel, going back and observing history - not interfering. They take assignments from a university that they are connected with. There aren't very many historians (time-travelers) in part because they end up getting killed on assignments, so the few that there are get to cover all sort of times, not just those they specialize in.
You have to suspend disbelief here and just go along for the fun ride. Yeah, probably sending a non-paleontologist...