When the goddess Artemis goes missing, she is believed to have been kidnapped. And now it's up to Percy and his friends to find out what happened. Who is powerful enough to kidnap a goddess?

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.

Buzz has a nightmare that his best friend Fly Guy has created a gigantic Frankenfly monster.

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

"A teenage girl leaves home to join the legendary Hunters, who protect the people from the terrifying monsters that have overrun their world"--

Jason, Piper, and Leo, three students from a school for "bad kids," find themselves at Camp Half-Blood, where they learn that they are demigods and begin a quest to free Hera, who has been imprisoned by Mother Earth herself.

Alexander and his new friend, Rip, are worried that the worms the rain has brought out are really the megaworms that Notebook of Doom describes but they soon discover that the night crawlers are trying to warn them about the monster tunnel fish that are threatening Stermont Elementary.

Middle-schoolers Nico, Opal, Tyler, and Emma face a more dangerous threat and must uncover the whirlpool's origins, as well as those of that freaky "Thing in a Jar," while fending off paranormal investigators.

A boy who looks ordinary transforms into grumbling Crankenstein on the most "lovey-dovey, yuckiest day of the year.".

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.