Thirteen-year-old Sully Stringfellow, his arch-nemesis Izzy Cisco, friend Moleman, and a league of long-forgotten plumber heroes team up to save Nitro City from mutant creatures in the sewers.

The kids and their monster buddies are hanging out in the tree house, when Jack launches into an epic, totally-heroic, super rad story of one of his many post-apocalyptic adventures. Of course, after he's finished, everyone's eager to one-up his tale with a story of their own. Soon, Quint, Dirk, June and Skaelka, and even Globlet regale the group with sometimes outrageous, often hilarious details of their action-packed escapades during the monster-zombie...

As the legend of the fearsome Ickabog spreads terror in the peaceful kingdom of Cornucopia, best friends Bert and Daisy set out to discover the truth and bring happiness back to the kingdom.

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

The three Igiby siblings, heirs to a legendary kingdom across the sea, find refuge from the Fangs of Dang in the Green Hollows, but Kalmar's monstrous appearance raises suspicion.

Jack teams up with the evil King Wretch in order to convince his friends to stay with him instead of going in search of others who may have survived the monster apocalypse.

Separated when the Fangs of Drang invade Ban Rona, the three Igiby siblings face sea dragons, Stranders, Ridgerunners, Cloven, and more in their final, epic battle.

When creatures from myth and legend come out of the shadows, setting off a chain of seemingly unrelated events, people start disappearing, suicides and hate crimes increase and protests erupt globally—until the world finds out what has frightened the monsters out of the dark.

When a mermaid princess needs their help protecting her adorable sea goats from being eaten by a greedy kraken, the Princess in Black and her friends come to her rescue, working together to take down the big blue monster.

When a legendary sea monster starts making waves in the Sea of Wrenly, Prince Lucas and his friend Clara travel to the Island of Primlox seeking information that might help them calm the beast.