Everworld
When Senna is kidnapped by the wolf Fenrir , the remaining protagonists in an attempt to save her are catapulted into an alternative fantasy world, called Everworld.
In Everworld, however; often accompanied by the god Loki , they will have to face powerful enemies and visit places that they thought existed only in fairy tales and myths, trying to survive, to prevent evil creatures from opening a passage to the normal world and to understand the why and how of their comings and goings.
Nearly all the gods shared similar characteristics such as shape shifting, physical perfection, superhuman strength and immortality.
Nearly all of them were portrayed as being cold and cruel in their attitude toward humans if not outright insane due to their power and long lives and would rather carry on their petty squabbles from ancient times.
Most are slow to change or act unless they feel immediately threatened allowing the threat of the Hetwan to grow.
They are also the most cosmopolitan of Everworld humans, as they readily accept people of other races into their ranks (African, Asian, etc.)
They worshiped Loki for an unknown period of time when he overthrew Odin and other major gods such as Thor and Balder disappeared.
In exchange of April's chemistry book, the Coo-Hatch improve Jalil's pocket knife to their quality of metal, giving them a small blade that can cut through anything, the group dubbing it "Excalibur".
Later, some of the tribes of the Coo-Hatch team up with the protagonists and develop cannons to use in an assault on the Hetwans (which supposedly takes place after the series end).
Their one true desire is to go back to their forges on their home world, which they cannot do without a gateway like Senna or her mother.
The Hetwan are large, sentient insectoid aliens that seem to exist as a collective hive rather than as a group of individuals.
Male Hetwan consist of two arms, a pair of wings, fly-like eyes, and three constantly moving claws near their mouths.
They do, however, wield devices similar to long straws (nicknamed "Super-Soakers" by the main characters), out of which they shoot a burning, venomous acid.
The Hetwan live in a great city that resembles a giant needle sticking out of a pit (referred to by Chris as "Junkie Dreamland"), with an assortment of strange creatures from their home world.
The Hetwan kingdom in Everworld alternates between perfectly hemispherical hills and gullies, giving a scooped-out appearance.
The Hetwan capital, where Ka Anor resides, is a massive tower (dubbed "Junkie Dream Mountain" for its needle-like appearance) in the middle of a lava and glass filled crater.
Self-described as "creatures of myth and legend", their main pastimes seem to be slaying dragons, rescuing young girls, and feasting.
Despite witnessing April taking out several trolls, the knights still believe that women should act "womanly"—no fighting, allowing themselves to be looked over and pampered.
The eunuchs in Everworld are male warriors with big, muscular bodies but with high-pitched voices; this is because they were castrated before they reached puberty.
(Why Hel's harem requires eunuchs is never explained, but perhaps indicates that her powers over or interest in castrated males is reduced or nonexistent.)
Their typical attire is a leather tunic and a tight helmet, and their main weapons are arrows and swords.
This ended when the crocodile god Sobek freed the capital and killed Pretty Little Flower, becoming Lord of all Egypt.
The mermaids swim around topless, and much to Christopher's delight, their hair rarely manages to cover their nudity.
At the beginning of the final book, Entertain the End, with Senna dead, David and the others wonder if the Sennites might forge an alliance with Ka Anor and the Hetwan.
