Here's what they said:
Date: 31 Jan 2008, 22:28
Our collection of several hundred books and articles in PDF format (click here for the library) has been up for 2 years now. That's a miracle. It's also been a pain in the ass (non-stop legal threats) and a drain on our money (server costs and $0 income).
So as of next week, it's gone.
Back it up now, grab what you want, thanks for your time.
I wish we could all afford to do everything for free, too."
Here's another great resource for pdf books:
hermetics.org The Esoteric Library