I am currently completing an on-line writing course at UEA which has been a marvellous experience. (Please contact me if you want more details.)
As part of the course I was able to indulge myself by asking for books for Christmas. I got a lot.
Before going on this course my favourite had been 'How to Write a Million' by Dibell, Scott Card and Turco which I recommend. Since going on the course I found these particularly invaluable:
Solutions for Writers by Sol Stein
The Freelance Writer's Handbook by Andrew Crofts
Solutions for Novelists by Sol Stein
The Writer's Journey by Christopher Vogler
I shall say more about them in future posts.