I'm considering starting a CSM army for 40k when they get their new codex, but before then, I'd like to read up on some of their background and stories.
Does anyone have any books regarding CSM that they'd recommend?
I'm partly considering starting to read the Horus Heresy books to gather insight behind their background, but I'm unsure as to whether they're more loyalist oriented or Chaos oriented, or a mix? Also, are the books entirely focused on CSM vs. Loyalists, or do Xenos races (Eldar, Orks, 'Nids in particular*) appear in them occasionally too? Whilst I'm mostly interested in CSM, I'd probably get bored if the books were constantly focused on their battles against the Space Marines and nothing but.
*Although I'm unaware as to whether or not they'd been encountered at the time of the HH books
Any recommendations for books to read that will increase my knowledge of the background of the Chaos Marines will be greatly appreciated!