For fourteen-year-old Eve Hallows, life can be summed up in one word—horrible. She has the most horrible friends. She lives in a horrible old castle. Even her family is a bunch of horrible monsters. However, in the monster-inhabited world of Gravesville—a world where messages are sent through Ouija boards, jack-o’-lanterns get facials to suit their moods, and the worst thing Eve has to deal with are those annoying zombie tourists who overrun her favorite graveyard during the Halloween season—horrible means wonderful. And everything for Eve is perfectly horrible. But her life is about to go head over heels when a mysterious group known as The Source starts terrorizing Gravesville. Now she must move to the human world—where everything is opposite ... and for Eve, that's absolutely adorable!

Ever since encountering The Source and its minions on Halloween, Eve Hallows has found life surprisingly quiet … not to mention adorably boring! So when Dad receives a Ouija message that she must return to Gravesville, Eve couldn't be happier—at least until she discovers the Director of URNS, also known as the Grim Reaper, has a special job for Eve … one that will lead her to New York City and to the true identity of The Source. With The Book of Shrieks offering zero help and a new URNS agent driving the school boys—and Eve!—crazy, Eve's beginning to realize this whole saving-the-world nonsense isn't what it's cracked up to be. All this and she still has to find The Book of Shadows....

So far, Eve's summer vacation has been uneventful, but when her grandparents—traveling all the way from the monster world known as Gravesville—appear at her doorstep, she learns that the URNS Director has gone missing. Worse, a new director, bent on destroying humans, has taken over URNS. Eve and her family are no longer safe in the human world, and as they race to escape this new threat, Eve stumbles into a trap, which forces her back to Gravesville along with her family and friends. But once there, everything goes adorably wrong, and her best chance to get out of this mess is to seek out The Book of Shivers and the elusive author Sedrick Creach—the only creature who knows the secrets of the Nightmare Books. Unfortunately for Eve, searching for Sedrick and the next book in the series will reveal uncomfortable details about her own murky past. Once again, Eve and her friends find themselves on an incredible adventure—one that involves underground battles with bloodthirsty creatures, a lightning-fueled train, and some unexpected new allies. Hilarious and bone-chilling, this third book continues the story of an unlikely hero trying to save not one, but two worlds … This time around, though, Eve's not sure she can even save herself.