BEYOND is the perfect title for these underwater adventures because they can go from the expected to the unexpected with a flip of a fin. Veteran diver Bob Burgess starts it with his personal account of an encounter of the worst kind. A hungry Bull shark corners him on Sand Key with a bagful of speared fish. When the shark demands the fish it makes Bob mad. He stubbornly hugs his catch and fins fast for his boat with the bull hot on his tail. What...