From the colophon of the PDF:
This is a freely available Netbook for Tekumel. It is not freeware. It is copyrighted and thus protected under law. Please feel free to download and peruse the material, and if you
find use for it, please register your copy
[registration address/instructions redacted]
This book is a reprint of the previously published Deeds of the Ever Glorious.
This electronic version of the original was free and had no index. An index was later created for it by Krista Donnelly.