I am new to the 40k world but I have been GM'ing an RT game for a few sessions and really like the setting and game. I recently bought the Dark Heresy book Blood of Martyrs and found it a great resource for Ecclesiarchy background and faith abilities.
My campaign has a deamon theme to it and was wondering if the Deamon Hunter book would be a good resource. I saw that the table of contents is filled with player data but one chapter has a focus on deamons and ruinous powers.
Is this chapter very deep? Would it be worth getting for this information? I would like to create a deamon enemy which will challenge the players. Right now they havent met it yet but they are starting to put the threads together.