Book Series · 3 Books

Secret S.T.E.A.M. Society Books

In order from Secret S.T.E.A.M. Society: Horses to Secret S.T.E.A.M. Society: Spaceflight.

The Secret S.T.E.A.M. Society series is a set of 3 chapter books by Trevor Mueller, published in 2026. Written for ages 7–12, most books run about 140 pages.

Secret S.T.E.A.M. Society: Horses
Secret S.T.E.A.M. Society: Music
Secret S.T.E.A.M. Society: Spaceflight
Secret S.T.E.A.M. Society: Horses
Secret S.T.E.A.M. Society: Music
Where the story begins

First Book in the Series

Secret S.T.E.A.M. Society: Horses
Graphic Nov.
Sale price
$1899
Book #1 · Chapter Book · Ages 7–12 · 2026

Secret S.T.E.A.M. Society: Horses

Students embark on a cosmic journey to uncover the secrets of horses.

136 pages
$19.99Save 5%
Hardcover
Summary: Join Thea, George, and Toot, an alien exchange student, as they embark on an extraordinary adventure with The Secret S.T.E.A.M. Society. When faced with a lesson on horses, Thea's fear turns into curiosity as the group travels through time, shrinks to microscopic size, and explores the universe to unravel the mysteries of these majestic creatures. Will Thea conquer her fears and discover the wonders of the equine world? Dive into a tale of friendship, learning, and cosmic exploration that promises to captivate young minds.
The complete set

Secret S.T.E.A.M. Society Series

3 books · Published 2026

Good to know

Common Questions

How many books are in the Secret S.T.E.A.M. Society series?

There are 3 books in the Secret S.T.E.A.M. Society series. It began with Secret S.T.E.A.M. Society: Horses in 2026, and the newest book, Secret S.T.E.A.M. Society: Spaceflight, was published in 2026.

What ages are the Secret S.T.E.A.M. Society books best for?

The series is best for ages 7–12, based on the age ranges of the individual books.

Keep exploring

Similar Series