I got this pdf during an Adamant $1 sale, and does a nice job of offering gaming opportunities and source material based on many of the sagas of the Red Planet so many of us love. A couple of sections seemed a bit skimpy on content, and often this product feels like an accessory rather than a stand-alone attempt. I'm not sure I'd have picked it up at $24.95, but at a lower price, I certainly would again.