It was alright. I mean, it relies very heavily on an aggressive aryan invasion hypothesis, as you would expect from when it was written. I didn't check his footnotes, but there weren't even enough of them in number to properly justify some of the claims he was making about the derivations of various gods and whatnot. Its basically a whole bunch of speculations, as is the case with most indological books. Thats ok though. They were interesting, and relatively plausible speculations in most cases.
Its also a free book.