Last Light (Halo #18)

It is 2553, and the three-decade long Covenant War that defined a generation has suddenly drawn to a close. Yet, in the remotest parts of human space, tensions remain that threaten to overflow into another full-scale conflict. When the planet Gao is revealed to harbor ancient Forerunner technology that could solidify the UNSC’s military supremacy for centuries to come, Insurrection loyalists will do anything to ensure that never happens…