If you liked Hunger Games 

The 5th Wave (series) by Rick Yancey

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, and on a lonely stretch of highway, Cassie runs from Them. The beings that only look human, who roam the countryside killing anyone they see. To stay alone is to stay alive, Cassie believes, until she meets Evan Walker.

Defiance (series) by C.J. Redwine

Rachel and Logan must throw their lots together in order to fight for justice against a cruel city-state dictator known as the Commander. At 15, Rachel possesses qualities normally forbidden to girls, such as fighting skills, self-confidence, and a nurtured belief in her own independence. Logan, a few years older, became her courier father’s apprentice when he was an orphan. Now that her father has disappeared, the teens discover, to their mutual dissatisfaction, that Logan has been named Rachel’s protector.

Enclave (series) by Ann Aguirre

In a post-apocalyptic future, fifteen-year-old Deuce, a loyal Huntress, brings back meat while avoiding the Freaks outside her enclave, but when she is partnered with the mysterious outsider, Fade, she begins to see that the strict ways of the elders may be wrong--and dangerous.

Eve (series) by Anna Carrey

Where do you go when nowhere is safe? After a deadly virus wiped out most of Earth's population, the world is a terrifying place. Eighteen-year-old Eve has never been beyond the heavily guarded perimeter of her school, where she and two hundred other orphaned girls have been promised a bright future in The New America. But the night before graduation, Eve learns the shocking truth about her school's real purpose—and the horrifying fate that awaits her. So she flees.

The Hunt (series) by Andrew Fukuda

Don’t Sweat.  Don’t Laugh.  Don’t draw attention to yourself.  And most of all, whatever you do, do not fall in love with one of them. Gene is different from everyone else around him.  He can’t run with lightning speed, sunlight doesn’t hurt him and he doesn’t have an unquenchable lust for blood.  Gene is a human, and he knows the rules.  Keep the truth a secret.  It’s the only way to stay alive in a world of night—a world where humans are considered a delicacy and hunted for their blood.

Inhuman by Kat Falls

Beyond the Titan wall lies the Feral Zone, and the only people who break quarantine and venture there are the "fetches", who are paid exorbitant sums to bring back items that were left behind when the wall went up--but Delaney McEvoy's father is there and she is being forced to find him and bring him back.

Partials (series) by Dan Wells

Humanity is all but extinguished after a war with Partials—engineered organic beings identical to humans—has decimated the population. Reduced to only tens of thousands by a weaponized virus to which only a fraction of humanity is immune, the survivors in North America have huddled together on Long Island. But sixteen-year-old Kira is determined to find a solution.

Reboot (series) by Amy Tintera

Wren Connolly died five years ago, only to Reboot after 178 minutes. Now she is one of the deadliest Reboots around . . . unlike her newest trainee, Callum 22, who is practically still human. Unfortunately, Callum’s big heart also makes him a liability, and Wren is ordered to eliminate him. To save Callum, Wren will have to risk it all.

Shatter Me (series) by Taherah Mafi

No one knows why Juliette's touch is fatal, but The Reestablishment has plans for her. Plans to use her as a weapon. But Juliette has plans of her own. After a lifetime without freedom, she's finally discovering a strength to fight back for the very first time—and to find a future with the one boy she thought she'd lost forever.

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The Testing (series) by Joelle Charbonneau

Sixteen-year-old newly graduated Cia Vale is selected to take part in The Testing, a process that offers the only chance at a college education and training to become part of the next generation of leaders. Cia has spent years preparing for this—it’s her chance to help the United Commonwealth recover from the devastating Seven Stages War. Cia’s father, who took part in The Testing himself, warns her to trust no one.