Halo The Fall Of Reach ( Sci-fi ) by Eric Nylund

• Protagonist- Master chief and his squad, Linda, Fred,  (Blue team)
• Antagonist- The Covenant (The Aliens)
• Defending earth and the remains of planet reach from the covenant, a ancient alien race commanded by the prophets to find and activate all forerunner artifacts along with defending them from other civilizations. One of these artifacts is Halo, a artificial ring world with the task to kill all living things in a couple thousand mile radius instantly. But the covenant believe that activating halo will lead them on the Great journey! Only Master Chief and his squad can stop them.