Infernal Alliances — Thomas K. Carpenter

Allies can be found in unlikely places.The threat against the Hundred Halls grows clearer by the day—the barrier between Invictus and the demonic realm is breaking down. In hopes of stopping the invasion before it begins, the Order of Merlin must court alliances with powerful beings who have their own suspect motives. The mages will also have to come to terms with the demons of their own pasts, solve the conflicts within the Hundred Halls, and put themselves and their futures at risk if there is any hope of surviving.