Summoned to Tourney

Elves in L.A.? Not so hard to believe. But when things get a little too hot in L.A. where do they go? Up north to San Francisco. All is well there with our elf-lord, his human bard companion and the mage who brought them all together - until it turns out that San Francisco is doomed to fall off the face of the continent unless our bard can summon the Nightflyers, the soul-devouring shadow creatures from the dreaming world - creatures no one on Earth could possibly control... (adapted from the back cover blurb of the Baen first edition)