Check out the latest in these series (or start from the beginning):
Scarlet by Marissa Meyer ("Lunar Chronicles")
Indigo Spell by Richelle Mead ("Bloodlines")
Requiem by Lauren Oliver ("Delirium")
Fans of Susan Beth Pfeffer's "Life As We Knew It" series, can look for The Shade of the Moon in the Fall. And "Maze Runner" devotees might be interested to know that James Dashner is starting a new series called "The Morality Doctrine" that will be available in October.