May I suggest the following:
Bedlam Bard series (elves & fantasy creatures in the modern world):
Knights of Ghosts & Shadows by Mercedes Lackey & Ellen Guon
Summoned to Tourney by Mercedes Lackey & Ellen Guon
Beyond World's End by Mercedes Lackey & Rosemary Edghill
Spirits White as Lightning by Mercedes Lackey & Rosemary Edghill
(the first two are collected together in Bedlam's Bards)
Of course, be sure to read all of the Michael Moorcock novels too
