Red Rising by Pierce Brown
In the future, human society is color coded, with Reds being the lowest on the rung. Darrow is a Red, and works with the other Reds to make the surface of Mars livable. However, one day by chance Darrow discovers that Mars has already been terraformed and colonized, and that he and the Reds are merely slaves. Determined to get out of his class, Darrow infiltrates the Institute and competes with the Gold class to become part of the next generation of human overlords
Review from Publishers Weekly:
Debut author Pierce shoots for the next Hunger Games with mixed results in this melodramatic SF series opener. Sixteen-year-old Darrow is a Red miner, the lowest worker caste on Mars. Darrow’s people live in hellish conditions underground and mine the precious silvery helium-3 needed to terraform the planet. Darrow’s father was hanged for performing a traditional dance, and when Darrow’s wife, Eo, discovers that Mars’s surface has been livable for centuries and then sings a forbidden dirge in public, she too is executed. Awash with grief, Darrow is recruited by the rebel Sons of Ares to infiltrate high-caste Gold society and help overthrow the government. After weeks of surgery and training, Darrow enters Mars’s most selective school, but being accepted at the Institute is one thing; surviving a murderous hazing, ruthless power struggles, and a brutal war game won’t be so easy. Determined to lead his people to a better future, Darrow will do anything to win. Pierce offers a Hollywood-ready story with plenty of action and thrills but painfully little originality or plausibility.