Reddit mentions of The 5th Wave

• The 5th Wave - After the 1st wave, only darkness remains. After the 2nd, only the lucky escape. And after the 3rd, only the unlucky survive. After the 4th wave, only one rule applies: trust no one.
  
  Now, it's the dawn of the 5th wave, ad on a lonely stretch of highway, Cassie runs from Them. The beings who only look human, who roam the countryside killing anyone they see. Who have scattered Earth's last survivors. To stay alone is to stay alive, Cassie believes, until she meets Evan Walker. Beguiling and mysterious, Evan Walker may be Cassie's only hope for rescuing her brother--or even saving herself. But Cassie must choose: between trust and despair, between defiance and surrender, between life and death. To give up or to get up.
  
  
• The Giver - Jonas's world is perfect. Everything is under control. There is no war or fear of pain. There are no choices. Every person is assigned a role in the community. Jonas lives in a seemingly ideal world.
  
  When Jonas turns 12 he is singled out to receive special training from The Giver. The Giver alone holds the memories of the true pain and pleasure of life. Not until he is given his life assignment as the Receiver does Jonas begin to understand the dark secrets behind this fragile community. Now, it is time for Jonas to receive the truth. There is no turning back.
  
  

Made me of the cover of The 5th Wave by Rick Yancey. http://www.amazon.com/gp/aw/d/0399162410?pc_redir=1409054686&robot_redir=1

I love reading books!

If you like YA and sci fi like Ender's Game, try The 5th Wave. It's a pretty darn cool alien invasion story.

I think you could end up enjoying The Fifth Wave series. It's got elements of both throughout.