SHORTCUTS #4: SCUBA DIVING TO THE EXTREME by Sigmund Brouwer

Scuba diving--there's a lot more to worry about than sharks! "I can't breathe!!!" Ian Hill spends his Florida summers helping his uncle run a dive shop. But just when he thinks it's going to be another boring summer hehind the counter, Ian hears that a recent storm has uncovered a pirate shipwreck hidden for years on the ocean floor. Soon Ian's slow summer at the scuba shop turns into a diver's nightmare.