Fiend Lore?

Been browsing the forums trying to find what I can. So far it's little snippets thrown into other stories. The most I've found is the racial info on the main site, but aside that...

Is there any? My new alt is a fiend, since playing something a bit more on the darker side of things is something I've been wanting to do lately (no, Kandrin doesn't count.) If there is, any chance I can be pointed in that direction?

There is a little you can find, but not much has been released. The Labyrinth will contain a little more.