Red Horizon (Book One). Red Horizon, #1

In the near future, as Earth stands on the precipice of global war, rival superpowers race to establish military footholds on Mars, turning the Red Planet into the next battleground for dominance. Tensions escalate as both factions preparing for an inevitable conflict that could determine the future of humanity. But just as war seems imminent, a series of catastrophic acts of sabotage cripple both sides.
The survivors come to a terrifying realization-neither side is responsible. Something else is on Mars. Something ancient. Something watching. As paranoia and desperation take hold, former enemies must set aside their differences and work together to uncover the truth. survival comes at a cost, and the real war may not be for territory or power, but for the future of the human race itself. With time running out and an unseen enemy closing in, the last survivors of Red Horizon must make an impossible choice: fight together or die alone.