Title: The Dresden Omens
Fandom: Good Omens, The Dresden Files
Pairing: Harry Dresden/John Marcone, Aziraphale/Crowley
Categories: crossover, humor, a bit of action/adventure
Length: Long (17,879 words)
Warnings: Spoilers for Good Omens, and the Dresden Files novels through book ten.

Author on LJ: shiplizard
Author Website: shiplizard

Summary:
In which a demon (who did not fall from grace so much as saunter vaguely downward) is sent to tempt a hero (who's reluctant at best) and has some trouble with the job.

Review:
Crowley gets assigned to tempt Harry Dresden; this does not go well. Every avenue he tries backfires (the car, the dog, the apprentice, the brother), Aziraphale is busy not answering his phone or checking his messages, and the Legions of Hell won't cut him any slack. Fortunately, Crowley's manipulations (and a little help from friend) finally have some surprising, and unexpected consequences.

I love Crowley, and this fic lets him shine, trying his best tricks and running into a wall each time. The rest of the main characters don't come in until nearly the end, but each are quick and snappy and so much fun. The author does a great job mixing up the two fandoms seamlessly and coming the two fandom's flavors of humor, though the focus is slightly more on the Good Omens characters.

The Dresden Omens (AO3) (LJ pt.1, pt.2, pt.3)