On a cold, dark night perfect for scaring, Fran is making a valentine, causing other members of Fright Club to howl and hiss over the idea of being in love.

Gretchen and Clark are scared to stay at their grandparents' house because they hear strange noises from a locked room.

Orphans Sabrina and Daphne Grimm are sent to live with an eccentric grandmother that they have always believed to be dead.

Grendel, the monster, tells his side of the Beowulf story, and compares his values with the chief values of human beings.

Percy hurries to Camp Half-Blood after his high school is invaded by demonic cheerleaders, and joins his demigod friends on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

Michael Munroe learns some unusual lessons from his teacher and discovers some shocking new secrets about HorrorLand theme park.

Cleo was the queen bee of the RADs, the normies, and everyone in between at Merston High. But now new girls Frankie Stein and Melody Carver seem to be taking over.

Alexander has just moved into Stermont, but the elementary school is being torn down, his new classroom is located in the hospital morgue, a notebook he finds is full of information about monsters--and everywhere he turns there are spooky balloon men determined to attack him.

Once upon a time, in a land blighted by terror, there was a very clever boy. The people thought the boy could save them, so they opened their gates and sent him out into the world. To where the monsters lived.

The disappearance of the goddess Artemis while out hunting a rare, ancient monster, prompts a group of her followers to join Percy and his friends in an attempt to find and rescue her before the winter solstice, when her influence is needed to sway the Olympian Council regarding the war with the Titans.