(From the publisher):
From the publisher
Young naturalists Hal and Roger Hunt dive straight into danger on a specimen-collecting trip to the Undersea City in the Great Barrier Reef off the coast of Australia.
But it's not just sharks and whales that the brothers have to fear, when an old enemy in Merlin Kaggs returns to haunt their steps.
Original title: Diving Adventure
Genre: Fiction→ Adventure→ Male-Action/Adventure
Fiction→ Children & Young Adult→ Adventure