Anyone else picked this up yet? Got my collector's edition yesterday evening, and polished it off in a night.
I've been craving for more World Eaters since Betrayer, and this really hit the nail on the head (bad pun intended). I think this is the Heresy at its best - we all know what's going to happen, but the real fun is getting inside the Legion's head as they decide whether or not to jump off a figurative cliff for their father. There's a surprising amount of reflection in their choice to take the Butcher's Nails - it's not just "because Angron says so" (although there's a fair amount of that as well).
I'd say Ian St Martin accomplished exactly what he set out to do with this book. Easily a top 10 contender in the HH for me.
Minor spoilers regarding Khârn and the collector's edition:
Edited by Gongsun Zan, 06 March 2019 - 01:20 AM.