Orbs II by Nicholas Sansbury Smith

Nicholas Sansbury Smith is the bestselling author of the Hell Divers, Orbs, Trackers, and Extinction Cycle novels, which have all been published by USA Today. He worked in disaster mitigation for Iowa Homeland Security and Emergency Management before moving careers to pursue his actual passion: writing. He enjoys running, riding, spending time with his family, and touring the world when he isn't writing or wondering about the apocalypse. He is an Ironman triathlete who resides in Iowa with his wife, pets, and a library full of books.