Margaret Peterson Haddix

Twelve-year-old Zola, who has a surprising connection to Jessie, discovers that she is stuck in a fake utopian future, and that those around her are counting on her to help them escape. Twelve-year-old Zola thinks she has the perfect life. She thinks everyone does, now that it's 2193, and humanity has solved all its problems. Insta-Closets deliver new clothes every morning, Insta-Ovens deliver gourmet meals on demand, and virtual reality goggles...

"Colin has spent all summer solving mysteries with his friend Nevaeh. But they've only ever dealt with other people's mysteries -- ones that are safe for Colin to think about. He's still stuck on the mystery surrounding his own father, who his mother refuses to talk about and he can't remember meeting. Then one morning Colin finds a shoebox on his porch with a note on top: 'Your father wanted you to have this.' Inside the box is a key. This new clue...

"Colin and Nevaeh are great at finding things. After all, they found each other and became best friends--even though their parents are business rivals. They also found hidden boxes of secret letters, which led them to unravel mysteries about kids from the 1970s. But when they started Mystery Solvers Inc., they didn't expect to be asked to find a ghost. Ree recruits them to investigate a series of old, spooky photos left behind in her family's new...

When a diphtheria epidemic hits her 1840 village, thirteen-year-old Jessie discovers it is actually a 1996 tourist site under unseen observation by heartless scientists, and it's up to Jessie to escape the village and save the lives of the dying children.

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.

Told from separate viewpoints, as Finn, Emma, and Chess Greystone and Natalie Mayhew, ages eight to thirteen, continue their quest to rescue their mothers they must return to the alternate dimension where truth is illegal.

A twelve-year-old girl raised in a foster village is returned to her biological parents, and discovers home is not what she expected it to be.

In a society that allows families to have only two children, a group of third-borns tries to save itself and others like them. In the aftermath of a crisis that threatens the safety of all shadow children -- illegal third-borns in a society that allows only two children per family -- Trey's friends expect him to take charge -- a function he doesn't want or think he can do. Trey's new role leads him to travel with Luke Garner's brother, Mark, to Population...

When thirteen-year-old Luke Garner unwittingly sets off a rebellion which sweeps the country and ousts the Population Police from power, he quickly realizes that the new regime is corrupt and he may hold the only key to true freedom.

Jonah was able to save all of time from collapsing but in doing so gained a twin brother, Jordan, who must learn what has happened and do his own part to save time--and his parents.