Found [Missing Volume: bk. 1]by Haddix, Margaret Peterson 

Paperback(Aladdin Paperbacks, 2009)

BTSB #: 409501 Available

Dewey: FAges: 8-12   
AR: 5 MG Lexile: 750

Genres: Science Fiction

Subjects: Adoption - Fiction Science fiction

Summary: When Jonah and Chip, who are both adopted, learn they were discovered on a plane full of babies that came out of nowhere, they uncover a mystery involving time travel and two opposing forces trying to repair the fabric of time.

Sent [Missing Volume: bk. 2]by Haddix, Margaret Peterson 

Paperback(Simon & Schuster Books for Young Readers, 2010)

BTSB #: 409594 Available

Dewey: FAges: 8-12   
AR: 5 MG RC: 4.5 3-5 Lexile: 730

Genres: Science Fiction

Subjects: Edward|bV, - King of England,|d1470-1483 - Fiction Richard, - Duke of York,|d1472-1483 - Fiction Richard|bIII, - King of England,|d1452-1485 - Fiction

Summary: Jonah, Katherine, Chip, and Alex suddenly find themselves in 1483 at the Tower of London, where they discover that Chip and Alex are Prince Edward V and Richard of Shrewsbury, imprisoned by their uncle, King Richard III, but trying to repair history without knowing what is supposed to happen proves challenging.