What would happen if historians, as they actually are, could go back in time?
It's actually a fun read with engaging characters. At times, the book does feel a bit too sprawling. Still it was great fun.
What I particularly liked is that by and large, the women in the book were friends with each other. There is also some wonderful comments and use of work place gossip.
(BTW - some short stories in this series are free audio books at the moment - 10/13/15)