I recently discovered that back in 2008 Peter Walsh apparently released a series on game programming called the Zen Game Bible. The Internet Archive has it cached at https://web.archive.org/web/20081121074929/http://www.zengamebible.com/
The series had (was supposed to have) three volumes and at least two of these seems to have made it to market. https://web.archive.org/web/20081025093150/http://www.zengamebible.com/order.html
I presume that these were hard-copies only but I cannot find much information on these books anywhere. Has anyone heard about this series?
Thanks in advance.