Tales from the Script

Book

Tales from the Script: 50 Hollywood Screenwriters Share Their Stories, by Peter Hanson and Paul Herman.

DVD

Here's a collection of interviews – in book form and on DVD – with a bunch of real screenwriters, including William Goldman, Shane Black, Frank Darabont, Paul Schrader, Nora Ephron, John August, John Carpenter, Paul Mazursky, Ron Shelton, Robert Mark Kamen, Antwone Fisher, David S. Ward, Steven E. de Souza, and others. (If you don't recognise all those names, you haven't been doing your homework as a screenwriter.) 

The book is great, the DVD is better. Partly for the joy of seeing the writers and hearing them speak, but also because of all the Extras on the disc. Worth it for the Advice for New Screenwriters section alone.

Here is a video clip which provides a taste of what's on the DVD.