Halo: Collateral Damage (Halo: Collateral Damage #1)

The Master Chief and Blue Team are deployed by the UNSC to Alpha Corvi II, a precarious human colony world, seeking to halt the Covenant's efforts to uncover something hidden below the planet's surface. The Spartan strike team quickly finds out that they will have to rely on each other and a small cadre of human rebels in order to survive and complete their mission.