Good quality and good price only negative is that all bookmarks in one list instead of organized by chapter drags down the experience.

Mark of the Xenos is an excellent addition to the Deathwatch line, and about as close as we'll get (thus far) to a truly comprehensive monster book for the Warhammer 40k RPGs. Pretty much everyone you'd want to kill as a Space Marine is here (except the Eldar and Necrons, sadly), from all the big-name Chaos daemons, to the Tyranids, the Tau's broadside and pathfinders, and the Orkz' boys, nobs and warbosses. If you've got the Deathwatch core rulebook, then you've got the complete set, basically, of tyranid, chaos and tau adversaries for the Jericho Reach, and are unlikely ever to be at a loss for enemies to throw at the Space Marines. What's more, the book is laden with adventure seeds, lore, and fluff ideas for you to base missions and campaigns around, so you can easily take the book and pretty much immediately start running missions out of it. It's fantastic. I just wish that, at some point, we'd get a book that I could review as "completely comprehensive" – with all the iconic adversaries in one place.

I'd give it 5 stars, but the fact that this is kind of a pain to read on anything other than a full sized screen is a downer. Printing is also a problem as there's no practical option for printing without graphics (And you'll spend more than the cost of the book to print yourself). This is b/c they elected to use some text as white on black, but the black is an image itself. Dropping images means the white on black text is white on white. Likewise, reading on a 13" laptop is a bit cumbersome as well, let alone a netbook or other small form factor machine.

I hope that in the future, we'll see properly layered PDFs or "Suitable for printing" pdfs from FFG. IMO their content is generally superior to some of the other marquee publishers... each page in their supplements practically drips adventure.

As in-print books, FFG's doing a pretty good job (albeit expensive). Too bad they seem to not understand digital media as yet.

This product is pretty easy to sum up: awesome new baddies to throw at your Deathwatch squad. That is doing it an injustice, but hey, who said Warhammer 40K was fair? Seriously though, this is a great addition to the Deathwatch product line providing what is essentially a “monster manual” of huge and terrifying creatures, heretics, and Chaos forces. I’ve been waiting a while for this. Granted, you can make your own creatures, especially if you know the tabletop game well (I don’t), but this gives you so many stat blocks and descriptions that you can repurpose them infinitely with flavor text to create pretty much anything beast you can imagine.

So what do you really get with this book: Tau, Tyranid, Orks, other crazy aliens, radicals, heretics, Chaos demons, Chaos Marines (probably not as diverse as when Black Crusade is released, which can’t come soon enough), and new mechanics for mass battles and Hordes. All of this is packaged in a crazy well produced PDF with production values and artwork to rival any other product line. I think everyone comes to expect something great when Fantasy Flight Games releases a book. I am not a huge physical book guy, so the PDFs are much appreciated with searching, bookmarks, and other features making navigation easy. However, I have to say the Deathwatch Core Rulebook I got as a gift is pretty amazing just to flip through. I never want Fantasy Flight to give up this line. As long as they keep making them, I’ll keep getting them. Now buy this book and challenge whether your Space Marines really know no fear.