BAEN The Cobra Trilogy

"The colony worlds Adirondack and Silvern fell to the Troft forces almost without a struggle. Outnumbered and on the defensive, Earth made a desperate decision. It would attack the aliens not from space, but on the ground—with forces the Trofts did not even suspect. Thus were created the Cobras, a guerilla force whose weapons were surgically implanted, invisible to the unsuspecting eye, yet undeniably deadly. But power brings temptation . . . and not all the Cobras could be trusted to fight for Earth alone. Jonny Moreau would learn the uses—and abuses—of his special abilities, and what it truly meant to be a ""Cobra.""" ...