I'm new to Median XL and am trying to get the book of summoning to do the black road challenge. Unfortunately, I seem to be having a lot of difficulty getting it to drop. My understanding is that, in the current patch, it drops from the Summoner in the Arcane Sanctuary on Terror difficulty. I seemed to have missed it on my main character and I made a 2ndary one to complete it again but still it didn't drop. Someone was helping me kill summoner so I'm wondering if it didn't drop because I died while trying to kill him. Before I try making a 3rd char, I just want to make sure I am looking in the right place or if there is a way to get it without having to get another char to that point.
Any help on this would be greatly appreciated