Book 2 of the Silver Call duology:
"Kraggen-Cor is a fortress, and the malevolent beings which possess it have well-guarded its walls. To reclaim it, the Dwarfs Army must break either the Dawn-Gate or the Dusk-Door, both of which are heavily fortified. Losses will be great, with no guarantee of success. But there may be a secret way in, for a small band of warriorsif they can only find the mythical Brega Path"
"Kraggen-Cor is a fortress, and the malevolent beings which possess it have well-guarded its walls. To reclaim it, the Dwarfs Army must break either the Dawn-Gate or the Dusk-Door, both of which are heavily fortified. Losses will be great, with no guarantee of success. But there may be a secret way in, for a small band of warriorsif they can only find the mythical Brega Path"