Here are books on craft I highly recommend:
First & most importantly: The Elements of Style, William Strunk, Jr. and E.B. White. You may not think you need it. I know I didn’t. But I do.
How to Write a Damn Good Novel, by James N. Frey
How to Write a Damn Good Novel II, by James N. Frey
They’re both damn good books, and no, it isn’t the same James Frey who embarrassed himself by writing a novel and calling it a memoir.
The Art of Fiction, by John Gardner
On Becoming a Novelist, by John Gardner
The First Five Pages, Noah Lukeman
The Art and Craft of Novel Writing, Oakley Hall
This last is a fairly cerebral book, but also practical. A good balance to some of the more How-Tos. Finally, you would only wonder about my self-esteem if I didn’t include:
Get That Novel Started, Donna Levin
Get That Novel Written, Donna Levin
However, I also have enough distance to tell you that Written is the better of the two.
I would love to hear about your favorites as well.