In June 2007 i "inherited" the open-sourced O'Reilly book called
Managing Projects with GNU Make, Third Edition.
By "inherited", i really mean that i forked a copy of the book
(which does not appear to have an owner
interested in keeping it up to date). It is hosted
www.wanderinghorse.net/computing/make/ and it directly influences (and is directly influenced by) toc2.
The "source code" for that book (OpenDocument format, plus some makefile code
demonstrating techniques from the book) is available for download
from wanderinghorse.net or it can be pulled from the toc2 subversion
svn co https://toc.svn.sourceforge.net/svnroot/toc/make-book/trunk make-book
That will check out the book to ./make-book, including the latest
OpenDocument master copy, the original (O'Reilly) version, plus sample makefile