I don't know if anyone else has picked up on this:
http://www.amazon.com/Open-Grave-Secrets-Undead-Supplement/dp/0786950692/ref=pd_sim_b_img_1
Perhaps the 4e version of Liber Mortis?
http://www.amazon.com/Open-Grave-Secrets-Undead-Supplement/dp/0786950692/ref=pd_sim_b_img_1
Perhaps the 4e version of Liber Mortis?