"In the remote mountains of Croatia, an archaeologist makes a strange discovery: a subterranean Catholic chapel, hidden for centuries, holds the bones of a Neanderthal woman. In the same cavern system, elaborate primitive paintings tell the story of an immense battle between tribes of Neanderthals and monstrous shadowy figures. Who is this mysterious enemy depicted in these ancient drawings, and what do the paintings mean? Before any questions can...

"This is a guide to the other side. To heaven, hell, and in between, from the golden halls of Valhalla to the ancient Egyptian journey of judgment. Prepare to explore eternal paradises, ghostly isles, and kingdoms of the dead. Through history, folklore, fact, and fantasy, discover how people across the world have sought to answer the unanswerable question: where do we go after we die?"--

Lupe Impala, Elirio Malaria, and El Chavo Octopus are now the proud owners of their own garage--but when a series of earthquakes hit their town and Genie, their beloved cat, disappears they find themselves traveling to the realm of Mictlantecuhtli, Aztec god of the Underworld, who is keeping Genie prisoner.

At the conclusion of The Mark of Athena, Annabeth and Percy tumble into a pit leading straight to the Underworld. The other five demigods have to put aside their grief and follow Percy's instructions to find the mortal side of the Doors of Death. If they can fight their way through the Gaea's forces, and Percy and Annabeth can survive the House of Hades, then the Seven will be able to seal the Doors both sides and prevent the giants from raising Gaea....

"July Chen sees ghosts. But her dad insists ghosts aren't real. So she pretends they don't exist. Which is incredibly difficult now as it's Hungry Ghost month, when the Gates of the Underworld open and dangerous ghosts run amok in the living world. When July saves a boy ghost from being devoured by a Hungry Ghost, he becomes her first ever friend. Except William is not a ghost. He's a wandering soul wavering between life and death.

After a scientist discovers he has reached the center of the Earth, he must help his nephew and a friend travel through a world of strange creatures to get back to the surface; after deciphering a code that leads to a legendary island where his grandfather is lost, a teenage boy partners with his stepfather to find the island and rescue his grandfather.

After negotiating with the queen of the underworld for ten days aboveground, teenage bruja Ren sets out to save her friends and put the Lords of Night back to sleep forever, all without the help of her shadow magic and time rope.