'Clancy is frightened. Weird things are happening in the strange old house on windswept Gull Island. Footsteps, bumps in the night, a man who vanishes into thin air - what can it all mean? Does it have anything to do with the Mogombo Mask, hidden away in a secret room?
Clancy and Nick and their friends Hung and Jemma are determined to find out - even it if means a midnight visit to the island's haunted cemetery.' (Publication summary)
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