The 5th Wave by Rick Yancey

In a world devastated by a series of alien invasions, humanity is on the brink of extinction as the extraterrestrial "Others" unleash a series of catastrophic waves designed to eradicate human life. The story follows Cassie Sullivan, a resilient teenager who navigates this perilous landscape in search of her younger brother, Sammy, after they are separated. As she encounters other survivors, including the enigmatic Evan Walker, Cassie grapples with trust and survival, determined to reunite with her brother while uncovering the truth behind the alien onslaught. Amidst the chaos, she must confront the ultimate question: what does it mean to be human in a world where humanity is the enemy?

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