If you enjoyed the book, why not give back to the community?
I am collecting a public directory with pdf files of the original sources cited in the book. Anyone can add to and edit this directory, so be careful, but please feel free to add additonal pdf files. So far we only have the references from Chapters 11 and 12. I'd like to have them all, and then I'd like to link to them directly from the book's pdf file.