Book Series · 8 Books

Alien in My Pocket Books

In order from Blast Off! to Space Invaders.

Eight illustrated chapter books follow Zack McGee and Amp, a four-inch alien whose arrival turns everyday problems into funny science adventures.

Reviewed by the Bookroo Editors Updated September 2, 2026

Alien in My Pocket #5: Ohm vs. Amp: A Comedy Adventure Chapter Book About Alien Science for Kids

Reading order

How to Read the Alien in My Pocket Books

Read the eight books in numbered order, beginning with Blast Off! Zack and Amp's friendship and their effort to prevent an alien invasion build across the series, with Space Invaders concluding the story.

Each volume centers on a different science problem, but the characters and larger mission carry forward, so publication order gives young readers the clearest experience.

Sources: HarperCollins' official Blast Off! listing, HarperCollins' official Space Invaders listing, Apple Books' maintained eight-book series listing.

For parents

What Parents Should Know

These short, illustrated chapter books are aimed at ages 6–10. Science ideas and simple experiments are woven into fast-moving stories, making the series a useful bridge from early readers to longer chapter books.

The adventures include secrecy, sibling conflict, alien threats, inventions that go wrong, crashes, and comic peril. The suspense stays light, and friendship, curiosity, and problem-solving drive the resolutions.

Where to start

Where Should My Child Start?

Meet Zack and Amp

Begin with Blast Off! for the alien's arrival, the start of Zack and Amp's friendship, and the setup for the continuing invasion story.

Where the story begins

First Book in the Series

Sale price

$474

Book #1 · Chapter Book · Ages 6–10 · 2014

Blast Off!

By Nate Ball, Macky Pamintuan (Illustrator)

A tiny alien crash-lands, and a boy must protect it from the world.

112 pages· 16,112 words· Est. 3 hour read

4.5/7 Bookroo

$4.99Save 5%

Paperback

Summary: Zack McGee's life turns upside down when a four-inch alien crashes into his room. Expecting danger, he instead finds a ticklish friend needing protection. As Zack hides the alien from the world, he embarks on an unexpected adventure filled with science and surprises. Can Zack keep his new friend safe, or will the world discover the secret in his pocket? Dive into this thrilling tale of friendship and discovery, complete with a fun science experiment to try at home!

In reading order