A Great Yoga eBook
Scribd.com is a site where one can upload documents, books, papers that one has written or has copyright privileges to. It supports many formats (PDF included) and even allows you to download a piece of work if you are allowed to by the original author who uploaded the document/book. For documents that are copyrighted, you can read the book/document right from the browser window itself.
I found this world-famous Maran Illustrated Yoga ebook that can be read at Scribd’s site.

Here are the links to some chapters. Other chapters are not available at the site.
I have browsed the ebook’s chapters and found it very helpful and informative regardless of the yoga level you are in (beginner or avid yogi/yogini). Hope you find it as interesting as I did!
Chapter 1: Yoga Basics (not available)
Chapter 3: Warm-Up Poses (not available)
Chapter 5: Seated Forward Bends
Chapter 8: Standing Balancing Poses (not available)
Chapter 9: Standing Forward Bends (not available)
Chapter 14: Relaxation & Restorative Poses
Chapter 15: Practices (not available)

Benefits:
* Stretches the hamstrings * Stimulates the abdominal organs and heart *
Caution:
Avoid if you have menstruation.
If you have any serious knee or ankle problems, avoid the bent leg position in this pose unless you have the assistance of an experienced instructor. Instead sit with the bent leg like the one in this picture:
(courtesy of Yoga Journal)

