This is a super fun, exciting short-story about survival and revenge. Not sure a .22 would have done as much damage as the author depicted, but i.e. was certainly gratifying. (My husband is absolutely adamant that a .22 is not an adequate carry gun as he doesn't believe it has enough stopping power - probably would have been more exciting with a .38 or a 9mm, but I think it's still cool.) This was a very well written, satisfying book about a serial killer and a survival's revenge. I think I might have liked a bit more detail about the best friend and the ex-husband and their role in the ending, but it was a fun, quick book.