Dragon Magic: Haven Series, Book 4 (Unabridged‪)‬

In Dragon Magic, the fourth book of the Haven Series, the Kindred call upon Brand for help. Things are not right in their kingdom beneath Snowdon. Modi has led a treasure-hunting expedition deep into the Everdark, a place where spine-terrors, blind croaking things, and great wurms reside. But it's been weeks; Modi is overdue, and the Gudrin fears the worst. Brand journeys into the magnesium bowels - and beyond - and discovers things buried there that he wishes he had never disturbed.