The Gates of Hell — C.J. Cherryh

Out of the underworld and into your heart! Rumor has it that there is a way out of Hell, through tunnels. Of course the rumors could he disinformation direct from the Father of Lies; all the Heroes of Hell who have assembled for the adventure know that. Though they do not know what hideous dangers they will face once they forsake the sanctuary of Julius Caesar's palace in New Hell, they are sure that boredom, the most awfiil fate Eternity has to offer, will not he one of them. Anything less they can handle; they are who they are, after all, and they have their army, equipped with the most modern weapons and electronics.... Join the greatest Heroes and Rogues of all the Ages in the first full-length novel in the greatest of all shared universes: Heroes in Hell.