"The Watcher" is well-researched with respect both to the bizarre case of Jack the Ripper and to the conditions in late 19th century London. It is a clever story and an interesting theory, although the conclusion is certainly no surprise. It needs one or two more proofreads, but overall the book is well-written. If you are the kind of reader who can't see past a few editorial glitches, you might want to wait for the next edition. Although I can't give this book more than 4 stars, I'd give 5 to Sam Croft's future potential as an author, and I'll watch for her work. I also have one more caution. If you're easily depressed, skip this book. There are no winners in this story, only losers; everyone, both the good and the bad, suffer and lose, but considering the subject matter and the deplorable conditions of the times, could any other depiction be justifiable? In fact, the story's ability to so thoroughly impact the reader's emotions is one the reasons I rate the author's future potential so highly. As painful as it is to read, I wonder how well Ms. Croft held up to writing it. I, for one, hope she is well and writes again soon.