I love Stephen King's book ON WRITING. Not so much a writing book--he's not going to tell you how to do it--but definitely inspiring.

My favorite (before I published) was SELF-EDITING FOR FICTION WRITERS which really helped me with editing my manuscripts to get them in the best possible shape. Again, it won't teach you how to write, but it will help edit. I also, personally, love Vogler's THE WRITER'S JOURNEY which is all about story and the hero's journey. Good stuff.