Science Fiction - MID

"In a world where past, present, and future have collided, Diego and his friends must rescue Diego's father from an evil group of renegades, otherwise their whole existence is threatened"--

Eleven-year-old Suzy Smith joins the troll-operated Impossible Postal Express, but she botches her first delivery by stealing a cursed snow globe containing a boy who claims there is a plot to take control of the Union of Impossible Places.

"When Sky Patel-Baum is sent to live with her mysterious uncle, she never imagines she'll end up in Area 51, a top-secret military base with a bajillion rules. Sky feels like she's landed in a whole new world, even though she hasn't left the planet. Because guess what? Area 51 is full of aliens. Lots and lots of aliens. But something even stranger is happening in Area 51: aliens are going missing. Where could they be? How come everyone thinks sky...

When Aster wakes alone on a tropical island, she has no idea what's happened, why she's there, or where to find her younger sister, Poppy. Her last memories are blurred. All she can remember is being on a boat with her aunt and other members of the ecovillage where she was sent to live after the death of her mother. But Sam, who once met the sisters on a plane, makes links between the mystery of their disappearance and suspicious happenings in his...

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 order to heal after his mother's death, thirteen-year-old Sal learns to reach into time and space to retrieve things--and people--from other universes.

"A girl named Petra Pena, who wanted nothing more than to be a storyteller, like her abuelita. But Petra's world is ending. Earth has been destroyed by a comet, and only a few hundred scientists and their children--among them Petra and her family--have been chosen to journey to a new planet. They are the ones who must carry on the human race. Hundreds of years later, Petra wakes to this new planet--and the discovery that she is the only person who...

Min, a thirteen-year-old girl with fox-magic, stows away on a battle cruiser and impersonates a cadet in order to solve the mystery of what happened to her older brother in the Thousand World Space Forces.

The invasion begins--but not as you'd expect. It begins with rain. Rain that carries seeds. Seeds that sprout--overnight, everywhere. These new plants take over crop fields, twine up houses, and burrow below streets. They bloom--and release toxic pollens. They bloom--and form Venus flytrap-like pods that swallow animals and people. They bloom--everywhere, unstoppable.Or are they? Three kids on a remote island seem immune to the toxic plants. Anaya,...

In this story inspired by Jules Verne's "20,000 Leagues Under the Sea," Ana Dakkar, a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world, makes astounding discoveries about her heritage and puts her leadership skills to the test against deadly enemies from a rival school.