Armed with secret knowledge, Juliette, now mayor of Silo 18 and her crew set out to rescue a world she hates but now understands better -- the world of the Silos with its rigid rules and terrible consequences for disobedience.

"To save the world and our future, Sigma Force must embark on a dangerous odyssey into an ancient past whose horrors are all too present in this page-turning thriller." --

Beneath the ice at the bottom of the Earth is a magnificent subterranean labyrinth, a place of breathtaking wonders-and terrors beyond imagining. A team of specialists led by archaeologist Ashley Carter has been handpicked to explore this secret place and to uncover the riches it holds. But they are not the first to venture here-and those they follow did not return. There are mysteries here older than time and revelations that could change the world....

"The first novel (originally published in 2003) by Jeff VanderMeer, author of Annihilation, including approximately 50,000 words of new material exclusive to this edition"--

As young archaeologist Will Burrows continues to search for his lost father in the strange underground world he has discovered beneath the city of London, he stumbles across a sinister plot with terrible implications for the world above.

"Robert Silverberg creates a breathtaking vision of the far, far future in an epic of rebirth and revelation, passion and despair, dread and awe-and the triumph of the human spirit."

"Lieutenant D'Agosta of the New York police and anthropologist Margo Green team up with the Navy's special forces to destroy monsters roaming New York's subterranean world--sewers, tunnels--killing the homeless to eat their brains, the monsters' staple food. By the author of Relic." --

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.

For centuries, the residents of the underground City of Ember have flourished in an amazing world of glittering lights and quiet contentment. But when the City's massive power generator begins to fail, the streetlamps fade - along with the hopes of the townspeople. Now it will be up to two courageous teenagers to follow a trail of clues left by the ancient builders to find the way out of Ember before their world is plunged into complete darkness.

Examines remnants of earlier civilizations, such as catacombs and aqueducts, uncovered beneath some of the world's major cities.