So, essentially, my reccomendations are to 'read Horus Heresy books', well, yeah. Obviously. Any books outside of the Horus Heresy that are any good?

RE; Curze.
I'll say it once, I'll say it again;

It feels like the writers stick Curze in for the sake of putting anyone in. What we want, is to see Primarchs fight. Except they can't fight, because a whole bunch of them need to survive until The Battle of Terra. But Curze? He's totally random, lol, amirite? Curze will fight anyone, anywhere, anytime. And that's why he gets to fight ALL the Primarchs! It's dumb. But, what else can the authors write without screwing it up?

Did Curze try and get Lion to punish him? I can't remember reading either of the Dark Angels books.