Sale price
$1697
Book #2 · Chapter Book · Ages 8–12 · 2024
Fathomless
A haunted fort, hidden treasure, and a mystery closer to home than expected.
304 pages
$17.99Save 6%
Hardcover
Book Series · 3 Books
Spineless Books
In order from Fathomless to Harmless.
The Spineless series is a set of 3 chapter books by Samantha San Miguel, published between 2022 and 2025. Written for ages 8–12, most books run about 300 pages.
Where the story begins
First Book in the Series
In reading order
Spineless Series
3 books · Published 2022–2025
#2
Sale price
$1697
Fathomless
Chapter Book · Ages 8–12 · 2024
A haunted fort, hidden treasure, and a mystery closer to home than expected.
Sale price
$1597
Spineless
Chapter Book · Ages 8–12 · 2022
A boy discovers a new species and must protect it from a collector and a mysterious curse.
Good to know
Common Questions
How many books are in the Spineless series?
There are 3 books in the Spineless series. It began with Fathomless in 2024, and the newest book, Harmless, was published in 2025.
What order should you read the Spineless books in?
Start with Fathomless and follow the series order — the books above are numbered #1 through #3.
What ages are the Spineless books best for?
The series is best for ages 8–12, based on the age ranges of the individual books.
The people
The Creative Behind the Books
The people who bring Spineless to life.
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