Margaret Peterson Haddix

Under Their Skin. - Simon & Schuster Books For Young Readers 2016 - 320 p.

Twelve-year-old twins Nick and Eryn investigate why their mother and new stepfather are keeping secrets, why they are forbidden to meet their stepsiblings, and, most important, why their lives are in danger.

Ages 8-12.

ISBN: 9781481417587 9781481417587 (hardcover)

LCCN: 2014036962

Subjects--Topical Terms:
Robots
Human beings
Extinction (Biology)
Secrecy
Twins
Brothers and sisters
Science fiction.