The Infinite Sea by Rick Yancey

Rating: 4.5/5 stars
★★★★★

The fifth wave is still happening, and getting more brutal. You still can't trust anyone, but the ragtag group of teens that managed to survive are trying to trust each other and keep each other alive through the madness.

The 5th Wave by Rick Yancey

Rating: 4/5 stars
☆★★★★

There have been 4 waves of the apocalypse. Now is the fifth wave -- the wave of aliens taking over the human race. You can't trust anyone because they've placed themselves inside the human population. You don't know who's who anymore. Cassie Sullivan has to use her intuition and trust friends to save her brother and herself from the fifth wave.