A tsunami strikes a small island in the South Pacific, destroying almost everything in its path...and leaving a strange new illness in its wake.

After the natural disaster, CDC epidemiologist Dr. Madeline Hamilton and her fiancé, FBI operative Quinn Traynor, go to Nalowale Island to investigate a deadly outbreak of unknown origin. Victims become aggressive and irrational, suffering from insomnia, hallucinations, and eventual death.

To make matters worse, not everyone cooperates with the agents' efforts to save lives. Devon Wheeler's fortune depends on completing construction of the Azure Cove Resort. He's hiding something, and he'll do whatever it takes to protect his massive investment and open the luxury complex on time, even if it means concealing critical information related to the outbreak.

When all communications to and from the island shut down and the wave of illness climbs toward a calamitous crash, Madeline uncovers something terrifying...and impossible.

Under quarantine conditions and without the help of modern equipment, Madeline and Quinn must collect the data and evidence necessary to make sense of the bizarre outbreak. What the world understands about viral pathogens is about to change forever.

This is the explosive third adventure in the FBI & CDC Thriller Series by USA Today bestselling author Jenifer Ruff. Mystery and medical thriller fans of James Patterson, Michael Crichton, and James Rollins will love Only One Wave: The Tsunami Effect.