This is a thorough review of the Ripper murders, with special emphasis on the Police aspects. There is a lot of material on Police Commissioner Warren, especially. This is in the first part of the book, but don't be put off by that. When the book gets onto the murders it provides expert discussion of the evidence, and there are photographs on nearly every page, many of which I haven't seen before despite having read half a dozen other Ripper books over the years. The authors Evans and Rumbelow are ex-policemen which gives them an insight into investigative procedures of that period.
Rumbelow wrote "The Complete Jack the Ripper" in the '80's. In that book he suggested there was covert police surveillance in Mitre Square on the night of Eddowe's murder, but this is not mentioned in this new book. On the last page Rumbelow nominates his "most likely" suspect, but both authors admit that on current evidence it is all speculation.