In the year 241, twelve-year-old Lina trades jobs on Assignment Day to be a Messenger to run to new places in her decaying but beloved city, perhaps even to glimpse Unknown Regions.

In a ruined and toxic landscape, a community exists in a giant silo underground, hundreds of stories deep. In a society full of regulations meant to protect the community, Sheriff Holston, unexpectedly breaks the greatest taboo of all: he asks to go outside. An unlikely candidate is appointed to replace him: Juliette, a mechanic with no training in law, whose special knack is fixing machines. Now Juliette is about to be entrusted with fixing her silo,...

When Will Burrows and his friend Chester embark on a quest to find Will's archaeologist father, who has inexplicably disappeared, they are led to a labyrinthine world underneath London, full of sinister inhabitants with evil intentions toward "Topsoilers" like Will and his father.

In 2007, the Center for Automation in Nanobiotech (CAN) outlined the hardware and software platforms that would one day allow robots smaller than human cells to make medical diagnoses, conduct repairs, and even self-propagate. In the same year, the CBS network re-aired a program about the effects of propranolol on sufferers of extreme trauma. A simple pill, it had been discovered, could wipe out the memory of any traumatic event. At almost the same...

In Underland, Macfarland delivers his masterpiece: an epic exploration of the Earth's underworlds as they exist in myth, literature, memory, and the land itself. He takes us on an extraordinary journey into our relationship with darkness, burial, and what lies beneath the surface of both place and mind. Traveling through "deep time" - the dizzying expanses of geologic time that stretch away from the present - he moves from the birth of the universe...

Surprising discoveries lie just below our feet under the streets of today's greatest cities.

Four generations ago, the Earth was rendered uninhabitable and those who remained were forced underground. In Compound Eleven, the hierarachy of floors is everything and on Eve Hamilton's floor, they fight. When she meets a boy from the top floor, Eve is no longer content to just survive, she is ready to fight for freedom.

Surprising discoveries lie just below our feet under the streets of today's greatest cities.

Return to the fun and fantastic underground world of Fraggle Rock, where children and adults alike can leave their worries for another day. This final season set features all 24 episodes, including the touching series finale, as well as interviews with the masterful puppeteers. Take an in-depth look at the beloved theme song and get a VIP ticket to the wrap party.

Princess Patema lives in an underground world, but one day tumbles headlong into a void and out into the wide open world above the surface. Age is a student on this surface world when he spies Patema hanging upside-down from a tree. He pulls her down to safety, struggling to keep her earthbound. Together they master the art of navigating competing gravitational forces and set out to discover the secret that keeps their worlds apart.