The Keepers of Sulbreth by Susan Gourley
Approx. 92,360 words.
Published on October 4, 2011.
Half-elf Cage Stone hides his heritage until he's trapped by the Keepers, a secretive group of sorceresses, into helping them reset the magical iron seals holding a demon horde at bay. Though the Keepers have held the responsibility of the seals for generations, something is wrong this year. Cage may be their only hope against an evil they've never encountered before.