Link here (I’ve already ordered mine). AT THE MOUNTAINS OF MADNESS is a reprint, not an update: the module uses the Call of Cthulhu 5.5 rules, but they offer conversion advice for 7.0 campaigns. Hardest hit: the folks trying to sell old copies for three hundred bucks.
Heh. Reminds me of why Steve Jackson Games reprinted GURPS Imperial Rome. IIRC, somebody on the forums came on and started bragging about how he managed to score a copy of the first edition for a ‘mere’ hundred bucks or so. Steve Jackson took careful note about how many people were enviously congratulating him, then went ahead and did another print run…