Killing Titan

In "Killing Titan," the second installment of the War Dogs trilogy by Greg Bear, Master Sergeant Michael Venn is thrust back into the fray as he confronts the mysteries of ancient artifacts known as the Drifters on Mars. After surviving his harrowing experiences there, he embarks on a perilous mission to Saturn's moon, Titan, uncovering new truths about the Drifters, the origins of life in our solar system, and the true intentions of the enigmatic Gurus who have been aiding humanity in its battles against invaders.