When thirteen-year-olds Jonah and Chip, who are both adopted, learn they were discovered on a plane that appeared out of nowhere, full of babies with no adults on board, they realize that they have uncovered a mystery involving time travel and two opposing forces, each trying to repair the fabric of time.

In a society that allows families to have only two children, a group of third-borns tries to save themselves and others like them.

In a future world of false identities, government lies, and death threats, Luke feels drawn to the younger brother of the boy whose name Luke has taken.

In a society that allows families to have only two children, third child Matthias joins the Population Police to infiltrate their system.

After returning the missing children from history to their original time periods, thirteen-year-old Jonah must save time itself when aviator Charles Lindbergh mysteriously appears and kidnaps Jonah's sister.

When Jonah and Katherine travel to early 1900s Switzerland and Serbia to return Albert Einstein's daughter, Lieserl, to history, her mother Mileva grasps entirely too much about time travel and has no intention of letting her daughter go.

Jonah and Chip have barely adjusted to the discovery that they are actually the missing children of history when a time purist named JB sends them, along with Katherine and Alex, hurtling back in time to 1483. JB promises that if they can fix history, they can all return to their present-day lives. Now Chip and Alex have to reclaim their true identities--as the king and prince of England. But things get complicated when the four discover that according

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Thirteen-year-old Nina is imprisoned by the Population Police, who give her the option of helping them identify illegal "third-born" children, or facing death.

Luke Garner is a third-born in a restrictive society that allows only two children per family. Risking his life, he came out of hiding to fight against the Population Police laws. Now, in the final volume of Margaret Peterson Haddix's suspenseful Shadow Children series, Luke inadvertently sets off a rebellion that results in the overthrow of the government. The people are finally free. But who is in charge now? And will this new freedom be everything...