The Mystery Code

Join Finn and his friends on a nail-biting adventure with No. 1 bestselling author Marian Brennan. The Mystery Code is an action-packed sea adventure filled with coded messages, historical mysteries and riddles...

Greystones, Ireland.

A teacher is missing in the quiet seaside village of Greystones!

A cryptic code that is nearly impossible to crack suggests there is treasure nearby.

A giant emerald found in a rockpool is evidence that the code might be true!

But all of their plans abruptly halt when they find their teacher injured on the rocks.

After a dramatic rescue, the kids return to search for the treasure...

An action-packed gripping story that boys and girls will not be able to put down!

Marian Brennan was most recently the #1 bestseller in Light Novels for Children with The Inventions of Finn O'Shea (25th March 2023)

It has been described by readers as exciting and suspenseful with every page. The Mystery Code is a page-turner with an action-packed plot.

Marian Brennan describes it as a modern-day Famous Five that takes children on a sea adventure where they have to work as a team and dig deep to save their teacher and find the treasure. It is an illustrated chapter book, suitable for 5-11 year olds.