Crickets By William C. Dietz

CIA Special Operations officer, Major Jim Carter, is sent to Serene, Texas, to investigate the disappearance of the town's 121 residents, who are murdered by insectoid aliens. The aliens, called the Prax, are hungry and seek to consume humans, leading to a global crisis where millions die and governments fall. Carter teams up with army officer and entomologist Anne Blake to understand the Prax and find a way to defeat them.