The second entry in the best-selling Troy Rising saga and follow-up to <I>Live Free or Die</i> from multiple <I>New York Times </i>and <I>USA Today</i> bestseller John Ringo.<P>When the orbital gates first materialized in the outer solar system, all seemed well. And, lo, peaceful traders made first contact–so whatever came next couldn't be so bad, could it? Yeah, it could. Very bad. Now humans have battled back from a Trojan-horse-like conquest by a tyrannical alien species to become a force to reckon with in the galaxy. On a crash-building course, we've built a near-impregnable battlestation of Deathstar proportions to prove it. But the enemy is remorseless and to survive we must take the fight to our attackers and prevail.  Unfortunatley, the bones and burnt hulks of those who have tried litter the star-ways. But these galactic imperialists have never contended with humans, a foe who is their match in sheer ferocity and desire to win.  <P><b>About <I>Citadel</i>:</b><P>“Ringo is back with a rousing tale of derring-do in space…[He] is as good as ever, giving the reader an epic space opera complete with grand vistas and large-scale numbers and keeping it humming with…pungent writing, snappy characters, and gallows humor.”—<I>Booklist</i><P><b>About previous series entry <I>Live Free or Die:</i></b><P>“[I]nfused with plenty of old-fashioned two-fisted can-do attitude. . .”—<I>Publishers Weekly </i><P><b>About John Ringo:</b>“If Tom Clancy were writing SF, it would read much like John Ringo.”—<I>Philadelphia Weekly Press<P></i><P>“. . .Ringo's lively action scenes and thorough knowledge of military subculture dynamics make enjoyable reading.”—<I>Publishers Weekly</i>