The Writer’s Journey: Mythic Structure for Writers (3rd Edition) by Christopher Vogler (Author), Michele Montez (Illustrator) is a valuable book for writing any story or script. It is interesting and informative. I advise you to read this valuable book if you are at all serious about writing. It is based on the work by author Joseph Campbell who wrote Hero with a Thousand Faces and The Power of Myth with Bill Moyers.
A book that the head of Acquisitions and Distribution at Alliance Atlantis suggested to me in 2001 (right before 9/11) was the book Making a Good Script Great 2nd Edition by Hollywood script consultant Linda Seger. It is “A guide for writing and rewriting” scripts.
If you are looking to be a writer in Canada then the book, The Canadian’s Writer’s Market 17th Edition, by Sandra B. Tooze is an important source. Besides being a valuable tool for helping you be a writer in Canada, it
…offers practical advice on manuscript preparation and marketing, income tax for the freelancer, copyright, and libal law. (Please see my post Protecting your Script).
Devorah's Blog 