Celtic Elements in Pillar of Stone & Sorrow

You've read Pillar of Stone & Sorrow; now discover all its secretsWhy is Derra bathed in purple light? What does her iXian plaint for Kalina mean? Which other medieval Irish and Welsh stories inspired part of the book? What on earth is going on with those calcified brains? What were the hospitality wafers based on? And how on earth do you pronounce everything?This companion volume to Pillar of Sto...