Cragbridge Hall: The Inventor's Secret by Chad Morris

Inventor's Secret, The (c) 2013 by Chad MorrisCragbridge Hall: The Inventor's Secret by Chad Morris is the first book in the Cragbridge Hall series, a series for middle grade readers, which follows the adventures of Derrik and Abigail, twins who are students at Cragbridge Hall, a cutting edge school in the future. 
Derrik and Abigail are in their first year at the school, working to fit in and find their place. Their grandfather is the founder of the school, which provides unique struggles for the two students, especially Abby, who is accused of having unfair favoritism shown to her. 
But their struggles in school suddenly become small when their grandfather and their parents are kidnapped. They don't know what to think or do, but after following clues their grandfather left behind, they begin to piece together what has happened to their parents and grandfather, and they begin to realize what they need to do to get their grandfather and parents back. And it will be even more tricky and dangerous than they could have imagined. 
But the pair are clever and determined, and have that to their advantage. Middle Grade readers who enjoy science fiction will enjoy The Inventor's Secret.