Count Hamnet Thyssen is a minor noble of the drowsy old Raumsdalian Empire. Its capital city, Nidaros, began as a mammoth hunters camp at the edge of the great Glacier. But that was centuries ago, and as everyone knows, its the nature of the great Glacier to withdraw a few feet every year. Trasamund, a clan chief of the mammoth-herding Bizogots, the next tribe north, has come to town with strange news. A narrow gap has opened in what they'd always thought was an endless and impregnable wall of ice.

What if mankind's "missing link", the apelike Homo erectus, had survived to dominate a North American continent where woolly mammoths and saber-toothed tigers still prowled while the more advanced Homo sapiens built their civilizations elsewhere? Now imagine that the Europeans arriving in the New World had chanced on these primitive creatures and seized the opportunity to establish a hierarchy in which the sapiens were masters and the "sims" were their slaves.

A dashing master spy takes on the enemies of the Byzantine Empire and discovers impossible inventions like gunpowder and telescopes in a magnificent romp from the maestro of alternate-history science fiction.

In April 1864, the Union garrison at Fort Pillow was composed of almost 600 troops, about half of them black. The Confederacy, incensed by what it saw as a crime against nature, sent its fiercest cavalry commander, Nathan Bedford Forrest, to attack the fort with about 1,500 men. The Confederates overran the fort and drove the Federals into a deadly crossfire. Only 62 of the colored Union troops survived the fight unwounded.

On his way to his betrothal, young Lord Penric comes upon a riding accident with an elderly lady on the ground, her maidservant and guardsmen distraught. As he approaches to help, he discovers that the lady is a Temple divine, servant to the five gods of this world. Her avowed god is the Bastard, "master of all disasters out of season", and with her dying breath she bequeaths her mysterious powers to Penric.