The Writer's Digest Handbook of Short Story Writing
I borrowed a copy of this from the local library as I have been considering getting a copy of my own. Advice that writers often give each other is to always be reading, whether fiction, history, or books about writing.
I found it to be well worth the borrow and it will definitely be moving up in my mental list of books to procure for when I am stuck with a writing problem. I ended up renewing the book after the first two weeks so that I would have more time with it. I found a great deal of information in it that even though it is a review I found useful to be able to isolate and focus on elements concept by concept. Some of the concepts have more than one article about them and by more than one author to give various viewpoints and methods of address.