The Code Busters Club

The Secret of the Skeleton Key by Penny Warner

The Secret of the Skeleton Key

The Code Busters Club #1

Penny Warner

224 pages • paperback • 2011

fiction middle grade mystery lighthearted mysterious slow-paced
The Haunted Lighthouse by Penny Warner

The Haunted Lighthouse

The Code Busters Club #2

Penny Warner

208 pages • paperback • 2013

fiction middle grade mystery lighthearted mysterious medium-paced
The Mystery of the Pirate's Treasure by Penny Warner

The Mystery of the Pirate's Treasure

The Code Busters Club #3

Penny Warner

193 pages • paperback • 2013

fiction middle grade mystery adventurous mysterious slow-paced
The Mummy's Curse by Penny Warner

The Mummy's Curse

The Code Busters Club #4

Penny Warner

181 pages • hardcover • 2014

fiction middle grade mystery mysterious medium-paced
The Hunt for the Missing Spy by Penny Warner

The Hunt for the Missing Spy

The Code Busters Club #5

Penny Warner

168 pages • paperback • 2017

fiction middle grade mystery mysterious fast-paced
The Secret of the Puzzle Box by Penny Warner

The Secret of the Puzzle Box

The Code Busters Club #6

Penny Warner

192 pages • paperback • 2018

fiction middle grade mystery mysterious fast-paced
A Disappearance in Magicland by Penny Warner
A Disappearance in Magicland
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Penny Warner

A Disappearance in Magicland

The Code Busters Club #7

Penny Warner

180 pages • digital • 2024 user-added

fiction