Sunset Publishing has a book ~ Curtains, Draperies & Shades ~ that has some nice ideas and step by step instructions... The one I have is quite old but if it's not around still, hopefully there is an updated version.
Singer also has a line ~ Sewing Reference Library ~ Sewing for the Home..
Your local fabric store should have a selection of books that you can browse through before buying.
Suzanne
http://sjonescustomdrapes.com