Book Series · 4 Books

Charlie Thorne Books

In order from Charlie Thorne and the Last Equation to Charlie Thorne and the Curse of Cleopatra.

The Charlie Thorne series is a set of 4 chapter books by Stuart Gibbs, published between 2019 and 2024. Written for ages 8–12, most books run about 420 pages.

Charlie Thorne and the Last Equation
Charlie Thorne and the Lost City
Charlie Thorne and the Royal Society
Charlie Thorne and the Curse of Cleopatra
Charlie Thorne and the Last Equation
Where the story begins

First Book in the Series

Charlie Thorne and the Last Equation
Sale price
$858
Book #1 · Chapter Book · Ages 9–12 · 2019

Charlie Thorne and the Last Equation

A young genius must outsmart a sinister group to protect Einstein's hidden equation.

402 pages· 76,082 words· Est. 8.5 hour read
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Paperback
Summary: Charlie Thorne, a brilliant young code-breaker, is thrust into a global race against the Furies, a dangerous group seeking Einstein's hidden equation. With the CIA relying on her genius, Charlie must navigate a perilous world of secrets and deception. Can she crack the code and save humanity, or will the equation fall into the wrong hands? In this high-stakes adventure, trust is scarce, and the clock is ticking.
In reading order

Charlie Thorne Series

4 books · Published 2019–2024

Good to know

Common Questions

How many books are in the Charlie Thorne series?

There are 4 books in the Charlie Thorne series. It began with Charlie Thorne and the Last Equation in 2019, and the newest book, Charlie Thorne and the Royal Society, was published in 2024.

What order should you read the Charlie Thorne books in?

Start with Charlie Thorne and the Last Equation and follow the series order — the books above are numbered #1 through #4.

What ages are the Charlie Thorne books best for?

The series is best for ages 8–12, based on the age ranges of the individual books.

Which Charlie Thorne book is the longest?

Charlie Thorne and the Last Equation (Book #1) is the longest book in the series at 76,082 words (402 pages).

Which Charlie Thorne book is the shortest?

Charlie Thorne and the Lost City (Book #2) is the shortest at 73,233 words (416 pages).

The people

The Creative Behind the Books

The people who bring Charlie Thorne to life.

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