"Margaret Weis, the bestselling author of many epic adventure fantasies, is at her best in The Seventh Sigil. Five hundred years ago, a clan of rebels was banished to the bottom of the world; ever since, these Bottom Dwellers have sought revenge, and now they are waging all-out war on the rest of humanity, those who live Above. Their deadly "contramagic" beams destroy buildings and attack naval airships, and their magical drumming brings terrible...
