“Transporting readers to a blood-soaked Ireland, Sharpson (When the Sparrow Falls) delivers modern horror at its best. . . . By turns tender and terrifying, sexy and stomach-turning, heartwarming and heartrending, this folklore-steeped exploration of generational trauma is a high-water mark for the Irish horror novel.”—Publishers Weekly, starred review

“Genuinely terrifying, the sort of book you shut away in the freezer at night so it won’t come looking for you. That is, if you can put it down. Knock Knock, Open Wide deservedly places Neil Sharpson at the front rank of modern horror writers. Open wide, if you dare, and read.”—Alex Grecian, New York Times bestselling author of Red Rabbit

“Irish mythology melds with family damage and a decidedly contemporary love story in this deftly told novel. Circling around one of the most terrifying versions of a child’s TV program in fiction, Knock, Knock, Open Wide has a remarkable ability to reveal the cracks in reality which, if we’re not careful, we can be pushed through, landing in a darker-hued reality that huddles snarling beneath.”—Brian Evenson, author of Song for the Unraveling of the World

“Celtic creepypasta Knock Knock, Open Wide is a dark miracle and Neil Sharpson is an infernal bard belched straight out from Hell itself. Your next nightmare has just arrived.”—Clay McLeod Chapman, author of Ghost Eaters

“Reading Sharpson’s latest. . . is like being grabbed unexpectedly. Readers know something feels terribly wrong but cannot get away from the horror and mystery of the story; it simply demands that they understand the truth and reach its conclusion. Irish folklore provides the foundation for this intriguing, otherworldly book about the doors we keep closed, the doors we cannot help but open, the things we cannot kill, and whether the truth is worth knowing in the end.”—Booklist