Draka discover how to go to parallel worlds. One Draka gets marooned in our timeline and wants to go back to get troops to conquer 'our' Earth.
<b>From the back cover of the Baen first edition:</b> "Now its <i>our</i> turn...
<p>THE COP: Detective-Lieutenant Henry Carmaggio had seen plenty of blood, both in Cambodia, and in twenty years of police work.He'd never seen anything like the Warehouse Massacre.
<p>That was just the beginning. Something was loose in his city, something inhuman that walked among us, killing with the easy precision of a leopard in a flock of sheep. There was no one else to track it down. And if he didn't it would kill and kill again - until the whole world was its hunting ground.
<p>THE DRAKA: Gwendolyn Ingolsson had been too close to the molehole experiment when it went wrong and hurled her into a parallel Earth filled with billions of antique humans. As a member of the Draka Master Race, genetically engineered to dominate unmodified humans, her duty was clear: call home. Build a molehole device in this universe and establish a bridgehead for the Race to come through. It had been a while since the Draka had an opportunity for conquest. Bring through a couple of orbital battle stations and the locals would be ... what was that expression she'd read? ah, yes.
<p><i>Toast.</i>"
