Adventures into the Unknown #18

This 52-page anthology issue contains three horror stories: "The Undying Brain," in which a lonely scientist atop a desolate mountain creates documentation of his work before apparently taking his own life, leaving instructions that his brain must not die with him; "The Zombie Summons," featuring a nocturnal summoning of the undead by a mysterious figure in a graveyard; and "The Royal Wraith," depicting an uncanny duplicate of Empress Catherine the Great of Russia appearing in her throne room, only to vanish after being shot by guards, with strange marks later found on the Empress's body before her death.