Another one that I found much more enjoyable after being more familiar with Lovecraft's oeuvre. Not that I didn't enjoy it the first time around, but having read the origin stories for the ghouls and the trapezohedron (as well as Emrys' alternate use of them) made it all the more fun. I am somewhat saddened that the ghouls here are just evil minions, as even Lovecraft's original tales gave them more depth, but I liked that the "recruitment" of humans remained (which Emrys ignored).

There's a clever misdirect as to who the traitor in the group is, but on second reading I saw the seeded clues as to where the real threat lay, and saw what was really going on with the other person acting oddly.