Flesh and Spirit(2007)

Carol Berg

In the first volume of a proposed duology, Valen, the rebellious scion of a dynasty of pureblood cartographers and diviners, has spent years denying his heritage, until he nearly ends up dead, addicted to a spell that converts pain to pleasure and possessing only a stolen book of maps, a mystical volume that could hide the secret to the doom of the entire world. Original.