I finihed Lesson in silence and completed 2 contracts. The dark elf woman appeared and told me about the litany of blood book and gave me one and the quest was completed. But there is no quest for killing the targets. Is this normal for everyone?
It's achievement only I think. I think there was some interaction with the book in the end, but I'm not sure if it was a part of a new quest or not.
Also try to look for those NPCs, not just wait for them at places you saw on video or something they might get killed before they even get to the spot you are waiting at and it might repeat each respawn.
The only thing about the Litany of Blood Achievement that I don't like is the phrase "You will know them by their eyes" I don't care if you have a 4k TV, this is the most difficult item to look for on an NPC. What stops the NPCs from just putting in a color corrective Contact Lens to screw with me while trying to complete the Achievement? (i jest of course)