Vitals

You'd think the secret of eternal life would be an eagerly awaited boon to humanity. Yet when cutting-edge researcher Hal Cousins travels deep below the ocean's surface in a two-man submersible, seeking primitive lifeforms that may hold the key to immortality, his pilot attacks him. Barely surviving, Hal maneuvers the sub to the surface--and finds a fellow scientist has shot up his research ship. Then his lab is destroyed, his twin brother leaves a mysterious message saying they're both being pursued by an unknown force, and his sister-in-law calls to tell him his twin, who is also researching life extension, has been murdered. Someone or something has already discovered the secret of eternal life. It has immense power and influence, and it will stop at nothing to protect its secret. --Cynthia Ward