This month's selection is Red Rising by Pierce Brown. Darrow is a Red, one of a thousand men and women who live in the vast caves beneath the surface of Mars, generations of people who spend their lives toiling to mine the precious elements that will allow the planet to be terraformed. Until the day Darrow, with the help of a mysterious group of rebels, disguises himself as a Gold and infiltrates their command school, intent on taking down his oppressors from the inside.