Title: 9/10ths of the Law
Fandom: Teen Wolf
Pairing: Stiles/Derek
Categories: AU, supernatural, demon!Stiles, crossover (cameo appearance by Supernatural characters), friendship, romance
Length: medium (6,875)
Warnings: none

Author on LJ: tsukinofaerii (no longer updating)
Author Website: tsukinofaerii, tsukinofaerii

Author's Summary: Stiles discovers the hazards of growing up a real boy when, at heart, he's not a real boy at all.

Review:
As Derek points out here, Stiles knows more about werewolves than anyone could learn from Google and the local library. That's because he's actually a demon. When the Stilinski's baby is stillborn, Stiles possesses the vacant body and finds himself changed in ways he never expected.

I love that his mother affects him so deeply, and that he starts having human reactions despite a millennia's worth of memories. Tsukinofaerii makes Stiles' more selfless side believable, so that he's the loyal Stiles we know and love, even as we never forget he's a demon. His friendship with Scott and his relationship with Derek are a joy. The AU take on the show makes for a new perspective, and the cameo crossover with Supernatural is a stroke of brilliance.

9/10ths of the Law
podfic by Podcath
ETA: Now with a sequel, Something that Finds You (NC-17)