The first half of this volume is (I think) supposed to give us some real answers. And I guess it sort of does, but I can't say I really get exactly what we're doing here. We certainly got a little more info, but I can't say it was very satisfying. This half is also hampered by art by Bryan Baugh, which is really excellent, but doesn't fit this story at all. (This has always been a big problem with this series--inconsistent art.) We also get the return of a slasher from a previous storyline, but one which I have apparently forgotten. I should really read these volumes closer together.
Anyway, in the last story, we revisit the faux Archie world, visited by my very favorite H/S villain: Mary Shelley Lovecraft. This story is superweird and MSL is much more meta than this series usually becomes, but I really dug it.