By Esther Friesner.
I found this on the shelf next to Nobody's Princess (found through Tamora Pierce) and decided it looked interesting.
This is a goofy book similar to Iris, Messenger, although Ilana is more sarcastic. When she applies for a summer job with the D. R. Temp Agency, she finds herself working for Clotho, Lachesis and Atropos, the three fates of Greek mythology, who really just want some time off to spend with their families... or something. Mayhem ensues. And if you think it's a joke, Ilana really is deathly allergic to eggs.
A pretty enjoyable light read, with at least one serious theme.