I also saw a review of The Secret Adventures of Charlotte Bronte by Laura Joh Roland online and thought it sounded interesting so I checked it out from the library. It was an interesting mystery read and I really liked how it had the people and facts of Charlotte Bronte's life wrapped throughout it.
Charlotte and Anne Bronte make a trip to London to visit their publisher and reveal their identies after it is thought that they are the same author. They meet the mysterious Isabel White on the train who is later murdered outside their lodgings. Charlotte seeks to discover who murdered Isabel and stumbles across a plot that could destroy the British nation.
While it was a good mystery, I didn't like how Charlotte seemed to think every man was in love with her. At the first part of the novel, it made her seem rather silly. I also thought many of the events were highly improbable for Charlotte, but I did like her spunky spirit and the thought that she had a chance at love, but chose her art instead. If you like mysteries and the Bronte sisters, it is definitely worth a read.