Hi,
I collected a great deal of Game Development Technical Materials, helpful to you!
I doubt the book authors appreciate you redistributing their copyrighted work on a whim.
This is a trap, isn’t it?
Some of those are public domain (e.g. Abrash’s book) and some are either out of print or very hard to get hold of - but others I’m pretty sure are not. If you’re going to distribute this, get the publishers’ permission and stick it on the site to prove it.