When an underground city begins to run low on resources, two teenagers search to escape above.

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 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.

When a roamer trades them an ancient book with only a few pages remaining, Lina and Doon return to Ember to seek the machine the book seems to describe in hopes that it will get their new community, Sparks, through the winter.

"What makes you 'you'? Chess has always been the protector of his younger siblings, Emma loves math, and Finn acts silly so he will be adored. They've been a happy family, the three of them and their mom. But everything changes when reports of three kidnapped children--who share the same first and middle names and exact birth dates--reach the Greystone family. This bizarre coincidence makes them wonder: Who exactly are these strangers? Before Chess,...

Having escaped to the Unknown Regions, Lina and the others seek help from the village people of Sparks.

Thirteen years ago, the world ended. A deadly chemical called Waste began to spread across the globe, leaving devastation in its wake. Millions died. Cities fell into chaos. Anything the Waste didn't kill, it mutated into threatening new forms. Kobi has always believed he and his dad were the only survivors. But when his dad goes missing, Kobi follows his trail--and discovers a conspiracy even deadlier than the Waste itself. Non stop action, chilling...

With a neighbors help, twelve-year-old Ford Falcon learns to survive in the harsh world outside the Bubble Cities by scavenging for items to use or trade--skills she needs when her parents unexpectedly go missing.

Determined to prove her conspiracy theorist father's beliefs about lost Cold War technology, Gillian, her skeptical brother, and their friends journey to the ruins of a vast doomsday bunker before they are confronted by dangerous adversaries.

When the rebels are captured Letta goes on the run, still striving to preserve language while the vicious new ruler of Ark plans to eliminate it once and for all.