These are the .xoe files for "Programming in the GalaxC Language", "The XXICC Anthology", install.pdf, compile.pdf, and TamingWB.pdf. It also includes the .gal files for collecting the individual .xoe chapter files into a book with cross-references. This has not been documented yet.
The .xoe files include chapter copyright and licensing text that is excluded when printing a complete book, since that is in the front pages of the book.
For more information on XXICC and GalaxC, see the 'blog post XXICC (21st Century Co-design) release 0.0k and XXICC's home page: xxicc.org.