Title: Imajica
Author: Barker, Clive

Summary
It's an epic in every way; vast in conception, obsessively detailed in execution, and apocalptic in its resolution. A book of erotic mysteries and perverse violence. A book of ancient, mythological landscape and even more ancient magic.
Most of all, it's a book of extraordinary characters. At its heart lies the great sensualist and master art forger, Gentle, whose life of excess comes unravelled when he encounters two other unforgettable individuals: Judith Odell, whose power to influence the destinies of the men besotted by her is vaster than she knows, and Pie'oh'pah, an alient assassin who comes from a dimension most of us don't even know exists.
That dimension -- or Dominion, as it is known -- is one of five in the great system called Imajica. They are worlds which are in many ways utterly unlike our own, but which are ruled, peopled, and haunted by species whose lives are intricately connected with us. As Gentle, Judith, and Pie'oh'pah travel the Imajica -- from the darkness of its infernal regions into its visionary places -- they uncover a trail of Dominion-spanning crimes and intimate betrayals that will lead them will lead them to a revelation so startling it will change the way you look at reality forever.