I personally have always leaned strongly toward Koz as Jack, but just finished reading They All Love Jack by Bruce Robinson and while some of his theories stretch credulity, some of his other information, especially about the purposeful ineptitude of the police and about the Florence Maybrick trial is compelling. I’d love to hear what you mostly more knowledgeable folks than I thought of this book. I’ve read more JTR books than I can count but a lot of this book appeared to be well researched. Although a lot, well most, of the Freemason stuff is difficult if not impossible to swallow. And his constant bashing of anyone else with a different perspective on JTR became beyond annoying. But definitely worth reading.