The Fifth Wave Full Series

In order: The Fifth Wave The Infinate Star The Last Star great condition The 5th Wave series by Rick Yancey follows teenager Cassie Sullivan surviving Earth's alien invasion, where "The Others" eliminate humanity through four devastating waves (EMP, natural disasters, pandemic, human-controlled "silencers") before the mysterious fifth wave, forcing survivors to distrust everyone as they fight for humanity's future, culminating in Cassie's efforts to rescue her brother and understand the aliens' true goals across three books: The 5th Wave, The Infinite Sea, and The Last Star.