Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you:
No adverts like this in the forums anymore.
Times and dates in your local timezone.
Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance.
Email notifications for threads you want to watch closely.
Being a part of the oldest wargaming community on the net.
If you are already a member then feel free to login now.
You'd be looking for both Codex: Chaos Daemons and Daemons of Chaos Army Book. Sure the latter is for fantasy, but both reveal different pieces about the nature of the four gods.
Aside from that, Slaves to Darkness and Lost and the Damned are pretty much the most awesome resources...assuming you want to shell out close to $1000 to find both of them in good condition. A copy of the collected Liber Chaotica would be much less pricey and also include boatloads of win.
Chaos Daemon Army Blog 
)
