Book Series · 2 Books

Under Their Skin Books

In order from Under Their Skin to In Over Their Heads.

The Under Their Skin series is a set of 2 chapter books by Margaret Peterson Haddix, published between 2016 and 2017. Written for ages 8–12, most books run about 320 pages.

Where the story begins

First Book in the Series

Sale price

$1797

Book #1 · Chapter Book · Ages 8–12 · 2016

Under Their Skin

By Margaret Peterson Haddix

Twins uncover hidden family secrets that could change everything.

320 pages· 55,573 words· Est. 7.5 hour read

$18.99Save 5%

Hardcover

Summary: Twelve-year-old twins Nick and Eryn are thrust into a mystery when their mom remarries, and they learn about secretive stepsiblings they must never meet. As they dig deeper, they uncover unsettling truths that could put their lives in danger. Why are these siblings hidden, and what secrets is their new family concealing? With their world turned upside down, Nick and Eryn must navigate a web of lies to uncover the truth. Will they unravel the mystery before it's too late?

In reading order

Under Their Skin Series

2 books · Published 2016–2017

#1 in Series

Sale price

$1797

Under Their Skin

Chapter Book · Ages 8–12 · 2016

Twins uncover hidden family secrets that could change everything.

#2 in Series

Sale price

$1797

In Over Their Heads

Chapter Book · Ages 9–12 · 2017

Twins race to save humanity without losing their newfound family.

Good to know

Common Questions

How many books are in the Under Their Skin series?

There are 2 books in the Under Their Skin series. It began with Under Their Skin in 2016, and the newest book, In Over Their Heads, was published in 2017.