Connie Willis has written some very entertaining books. Her most recent two books, Blackout and All Clear, are two of her best. I really enjoyed reading them.

Continuing in the time traveling historians universe we follow several of said historians to England during World War II. Much of the action takes place during The Blitz as the protagonists increasingly appear to be trapped in the past. The story is mostly set in London, but there are plenty of other locales, including Bletchley Park (and a short encounter with Alan Turing).

Highly recommended.