Book Series · 2 Books

Monster Sisters Books

In order from The Monster Sisters and the Mystery of the Unlocked Cave to The Monster Sisters and the Mystery of the Stone Octopus.

Where the story begins

First Book in the Series

Graphic Nov.

Sale price

$1995

Book #1 · Chapter Book · Ages 9–12 · 2019

The Monster Sisters and the Mystery of the Unlocked Cave

By Gareth Gaudin

Two sisters face a monster invasion in their seaside town.

160 pages

Summary: In a quiet seaside town, sisters Enid and Lyra confront a monstrous invasion. Armed with their love for architecture, history, and folklore, they must uncover the mystery behind the chaos. As the town's eerie past unfolds, the sisters race against time to stop the rampage. Can they solve the puzzle before it's too late?

In reading order

Monster Sisters Series

2 books · Published 2019–2021

Graphic Nov.

Sale price

$1995

The Monster Sisters and the Mystery of the Unlocked Cave

Chapter Book · Ages 9–12 · 2019

Two sisters face a monster invasion in their seaside town.

Graphic Nov.

Sale price

$1895

The Monster Sisters and the Mystery of the Stone Octopus

Chapter Book · Ages 9–12 · 2021

Sisters uncover a conspiracy as monsters invade their town.

Good to know

Common Questions

How many books are in the Monster Sisters series?

There are 2 books in the Monster Sisters series. It began with The Monster Sisters and the Mystery of the Unlocked Cave in 2019, and the newest book, The Monster Sisters and the Mystery of the Stone Octopus, was published in 2021.