Well it's out, $30, I got it for $20 from Amazon. This is the last of the art books and tells the end of the Heresy. Unfortunately they finish about 2/3 of the way through and then spend the rest of the book on a trading card index but since I got it for 33% off I can't complain can I?
I think the art was a bit weaker than the first 2 books and there's a lack of new stuff, we've already seen the Custodius and Sisters of Silence (untouchables). A 2 page spread of the Emperor vs Horus but it's one they've printed parts of at least twice so far. Some nice images of demons and the chaos prinarchs.
In all it's still pretty and a fun read.
Much more fun than my Chinese textbook at least.
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Horus loses BTW. In case you were wondering.
Some new fluff is added. The Emperor's secret project was building his very own Web Way porthole to claim the Worlds Wide Webway (WWW) for mankind. Go Team Space Emperor! Show them space elfs who rules the space universe! This is what Magus' warning spell wrecked BTW letting demons into the webway and almost onto earth. Boo Magus! I bet a primarch with depth perception wouldn't have done that. I'm glad your planet got nuked, I'd nuke it too if I was the Space Emperor.