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Summary
An enigmatic message leads the Code Busters on a treasure hunt on creepy Alcatraz Island, where they must use their problem-solving skills to unravel the mystery. Full description
Series: Code Busters Club
The secret of the skeleton key (Volume 1.)
The haunted lighthouse (Volume 2.)
Mystery of the pirate's treasure (Volume 3.)
The mummy's curse (Volume 4.)
The hunt for the missing spy (Volume 5.)
The secret of the puzzle box (Volume 6.)