The Walker of the Shifting Borderland by Douglas Smith

Aurora Award WINNER.

The Walker is a child of the two Realms of the Continuum, a prince of Order and of Chaos—and a rebel against both. When he falls in love with an ephemeral, a mortal woman who is the key to the balance between the Realms, he triggers a struggle for her life—and the fate of her universe.

"A very different sort of tale. ... A cosmic story of gods which seems to be inspired by the works of Michael Moorcock, and I think he would not be ashamed of it." —SF Crowsnest Reviews

"A tale of epic love when a mortal gets caught between a battle of the gods. Smith reminds us that we have the potential to change the world around us and that self-sacrifice can be a means of making the world around us better." —Speculating Canada

"The descriptions here have cosmic sweep…" —Locus Online