Michel Anders presents an e-book that covers OSL (Open Shading Language) shading.
I am happy to announce that I have just released a new e-book aimed at people who want to learn Open Shading Language for Blender. You can read more about it on this page.
You can find a sample of the first few chapters there and details on how to purchase it. Readers of BlenderNation who purchase it this year at Smashwords may enter the coupon code QK46Y to get it for just $3.99
I hope people will enjoy reading the book just as much as I enjoyed writing it.