Neil Grant

Hardie takes on counterfeiters who have created fake Wells Fargo checks.

A savage killer whale blockades a strip of coastline, capsizing boats and harassing skin divers and swimmers. Mike Nelson, armed with a shark-harpoon gun, engages the killer whale in a wild and desperate undersea battle.

A girl is placed in a straight jacket, securely locked in a trunk, and cast to the bottom of the ocean. It's all part of a carnival act, except she doesn't come up! Mike Nelson learns the secret of the act in time to save the girl from drowning.

Slade's visit to an old friend turns deadly when some people will stop at nothing to steal a last will and testament entrusted to Slade's care.

When the State of Florida is plagued with a series of underwater crimes, Mike Nelson is called to organize and train an underwater police force.