Sci-Fi Book Group: Red Rising, by Pierce Brown
As a member of the Reds, the lowest caste miners of Mars, Darrow looks forward to the day when the surface is inhabitable by all. When Darrow discovers the truth of Martian society -- that the Golds already live on the lush surface and intend to enslave the Reds forever in the mines -- he undergoes extreme plastic surgery to infiltrate the Golds and overthrow them from within.
Led by Marcy Maiorana