Megalodon — Eric S. Brown

Dr. Leia Carpenter arrives aboard Sonar Platform 1 as the biggest storm of the season is closing in on the top secret research facility. Her job to confirm or debunk the results of the experiments being conducted there quickly becomes a desperate battle for survival. Carpenter finds herself pitted against not only the raging storm and enemy agents but against a prehistoric creature that should not exist- a giant Megalodon with an equally large appetite and a burning desire for vengeance against those who have held it captive