Lucas Davenport and his daughter,Lettyteam up to track down a dangerous scientist whose latest project could endanger the entire worldin this latest thriller from #1 New York Times bestselling author John Sandford. Gaia is dying. Thatat leastis what Dr. Lionel Scott believes. A renowned expert in tropical and infectious diseasesScott has witnessed the devastating impact of illness and turmoil at critical scale. Society as it exists is untenableand the direct link to Earth’s death spiral; population levels are out of control and people have allowed disarray and disorder to run rampant. While most are concerned about deadly diseaseScott knows that it is truly humanity itself that will destroy Gaia. It’s only by removing the threat that the planet can continue to prosperand luckilyScott is just the right man for the job… When Scott then disappears without a traceLetty Davenport is tasked with tracking down any and all leads. Scott’s connections to sensitive research into virus and pathogen spread has multiple national and international organizations on high alertand his shockingly high clearance levels at various institutionsincluding the Los Alamos National Laboratorymake him the last person they’d like to go missing. As the web around Scott becomes more tangledLetty calls in her fatherLucashelp her lead a group of specialists to find Scott as soon as possible. But as Letty and Lucas begin to uncover startling and disturbing connections between Scott and Gaia conspiraciststheir worst fears are confirmedand it quickly becomes a race to find him before the virus he created becomes the perfect weapon.