*** Plot & Structure, James Scott Bell, 2004
I read Bell's Writer's Digest books in reverse order of publication date. Not on purpose, just what happened. I don't think it matters what order you read them, as long as you read them. Assuming you want to develop the craft of writing of course. Otherwise, read the book of your choice.
Plot & Structure is a comprehensive work on building the framework of a good story. It's filled with tons of practical tips for developing a storie and getting past dead ends and blocks. Good stuff. Also check out Revision & Self-Editing, The Art of War for Writers.