COLD WAR: Alien Storm: Omnibus Collection of Incursion, Siege, and Strike

They invaded her planet. They ambushed her unit. They'll have to pry Earth from her cold, dead hands...

When Lieutenant Cam Alvarez is called to investigate a desert massacre in the US Green Zone, she prepares for the worst. Once her team of soldiers arrives on the scene, she realizes the violence wasn't committed by human hands. Alien invaders already dominate Earth's expanding polar regions, but Cam had never seen Ringheads survive exposure to heat... until they storm her troops and abduct...