O’Reilly has begun a new book program called Rough Cuts that allows readers to follow along the development of a book in PDF form with updates along the way as the book evolves into a finished product.

One of the most in demand topics, as Tim’s post about Ruby book sales overtaking Python indicates, is Ruby. Suitably half of the new titles available concern Ruby. Ruby Cookbook , and Ruby on Rails: Up and Running.

I’m pleased to see this as I love the model and dove in head first when the Prag. Programmers released Agile Web Development with Ruby on Rails in the same style.

Tim explains, “In short, you can buy online-only access to the Rough Cuts directly from us for about 50% off the expected list price of the final book; you can pre-order the print book for about 35% off the list price; and you can buy both together for only about 10% more than the list price.” Why wait for the book to come off the press to dive into the material?