Book Series · 5 Books

Invisible Inc. Books

In order from The Schoolyard Mystery to The Karate Class Mystery.

Where the story begins

First Book in the Series

Sale price

$399

Book #1 · Picture Book · Ages 4–8 · 1994

The Schoolyard Mystery

By Elizabeth Levy, Denise Brunkus (Illustrator)

Invisible boy and friends hunt for the missing school ball.

48 pages· 3,285 words· Est. 26 min read-aloud

Summary: Chip, the invisible boy, teams up with his friends to unravel the mystery of the missing school ball. As they navigate the playground's secrets, can they uncover the truth before it's too late? Join their adventure filled with unexpected twists and turns.

The complete set

Invisible Inc. Series

5 books · Published 1994–1996

Sale price

$399

The Schoolyard Mystery

Picture Book · Ages 4–8 · 1994

Invisible boy and friends hunt for the missing school ball.

Sale price

$399

The Snack Attack Mystery

Chapter Book · Ages 7–9 · 1995

Snacks vanish mysteriously; an invisible boy investigates.

Sale price

$399

The Mystery of the Missing Dog

Picture Book · Ages 4–8 · 1995

An invisible dog vanishes. Can young sleuths solve the mystery?

Sale price

$399

The Creepy Computer Mystery

Chapter Book · Ages 7–9 · 1996

Mysterious messages haunt a class's online invitation. Can an unseen ally save them?

Sale price

$399

The Karate Class Mystery

Chapter Book · Ages 7–7 · 1996

A missing karate belt leads to a mysterious search.

Good to know

Common Questions

How many books are in the Invisible Inc. series?

There are 5 books in the Invisible Inc. series. It began with The Schoolyard Mystery in 1994, and the newest book, The Karate Class Mystery, was published in 1996.