Master of Furies: Raymond Feist

An ancient darkness lies waiting
War has swept across Marquensas. Gwen, beloved wife of Declan Smith, was killed at Beran`s Hill: hollow of heart, Declan swears to destroy the raiders, an ambition shared by Baron Daylon Dunmarch whose family was massacred as they fled the capital.
Hava, whose gift for piracy has won her the name of `Sea Demon`, is closing in on the whereabouts of those who unleashed the murderous hordes.
Her husband, Hatushaly, the last of the legendary Firemanes, seeks to control his magic and even travel among the filaments of energies that power all existence: the furies. Can he master them in time to combat the darkest threat the world of Garn has ever faced? And could that threat have come through the Rift?