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The Delta Games Series

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Book 1
The Mystery of Locked Rooms
Book 1

The Mystery of Locked Rooms

*Instant New York Times and USA Today bestseller!*Crack the codes. Find the treasure. Escape the house.From the acclaime... MoreThe Mystery of Locked Rooms

(1 review) 4 1
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Book 2
The House with No Keys
Book 2

The House with No Keys

This sequel to the New York Times bestselling book The Mystery of Locked Rooms follows the beloved Deltas as they race t... MoreThe House with No Keys

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The House with No Keys

The House with No Keys

30th September 2025
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The Mystery of Locked Rooms

The Mystery of Locked Rooms

9th January 2025
(1 review) 4 1

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