This PDF is a digital version of a printed book that was originally published on 11/05/2007. You can read the whole book for free online here.

This download is a .zip archive containing two versions of the PDF, one high-resolution version (78 MB) and one medium-resolution version (32 MB). Both versions are copyrighted under a Creative Commons Attribution 4.0 International License, and are able to be distributed freely in educational contexts.