THE DREAMS IN THE WITCH HOUSE WERE JUST THE BEGINNING! Arkham's own occult investigators HALSEY, PEASLEE, & LYDECKER have their hands full... There's a monstrous storm brewing over the college annex, something is haunting the Delapore Chemical Company, the university library is having trouble with the Whateley collection, the new librarian is probably too curious for her own good, and there's a young woman who may or may not be the rightful heir to the House of Jermyn. And let's not forget HP&L have agreed to provide security for the social event of the year. The guests have come to Arkham from all over the world, and only some of them might be human... but what else would you expect from the Wedding of Asenath Waite? Walter Gilman is Dead! But for Frank Elwood, the terror continues. One by one his fellow students are dying, and the odds of that being accidental aren't just improbable-they border on the impossible. To protect himself Elwood seeks help from HP&L, who might just help him unravel the terrible secret of... THE ELDRITCH EQUATIONS.