As far as I'm aware the only one written by a professional historian is Philip Sugden's 'The Complete History of Jack the Ripper' and it was very good when I read it. Stuck to the facts of each case in as much detail as there actually is and notes where previous books have gone wrong or too far. Makes great use of the official inquests and skewers certain theories for being ridiculous and out of date with modern thought.

A more recent one focussing less on the Ripper side would be 'The Five: The Untold Lives of the Women Killed by Jack the Ripper' by Hallie Rubenhold, however it appears to make some highly implausible or unsubstantiated claims in relation to the women or how the murders were committed (they were just sleeping and were caught unawares by the ripper for example and not prostituting themselves, which would appear to go against much evidence and common sense). In writing a feminist history of the women it seems to have fallen into an old trap - seemingly anathema to feminist thought? - that if some/all of the women were indeed prostituting themselves they somehow 'deserved it' more than if they were just down on their luck homeless women, or that prostitution was immoral, and the author is seeking to 'redeem' these women. It wasn't anywhere near as well received by those who know the cases as Sugden's and in my opinion from the little I've read on the cases was not convincing.