I’m only knocking a star because to some degree it feels like pretty familiar ground but regardless what is here is very well written and a strong story. A woman trying to get ahead in her civil service career in the Britain ends up transferring from languages to a secret project that turns out to be being a handler for time traveler yanked from the past where he would have died on an expedition.

The relationships are great and fully realized especially and the story is pretty interesting even if it goes a little hand-wavey on the time travel and consequences bits. Would recommend.