I think this book must be read as a historical document, as it’s sometimes 
considered the first serious graphic novel. Given that pedigree, it’s interesting to point out that the book is in fact somewhat transitional between books and comics, containing large sections of (hand-drawn) text, with somewhat simple drawings. I didn’t find the stories themselves particularly amazing (sorry if that’s utterly without class to say!) but they aren’t bad, and they are well drawn. And, as a window into the history of comics, it’s quite good. Incidentally, if you are interested in the history of Jewish New York, there’s a lot here for you as well.
Okay, but why is it under ‘mystery’?