The Fifth Wave [the Fifth Wave 01] -

The "Others" did not invade with lasers; they used systematic waves designed to dismantle human civilization and biology:

is the first installment in Rick Yancey’s best-selling young adult science fiction trilogy, centered on 16-year-old Cassie Sullivan as she navigates a world devastated by a multi-phase alien invasion . The story is known for its shifting first-person perspectives and a unique take on the "slow-burn" alien apocalypse. The Five Waves of Extinction The Fifth Wave [The Fifth Wave 01]