Fandom Category: Harry Potter
Pairing: Hermione Granger/Severus Snape
Fic Title: Pet Project
Link: At FF.net
Rating/Warning(s): M (in later chapters for violence and sex)
Why This Must Be Read:
I'm a sucker for epic H/S fic (it's the only HP fic I read, I don't know why), and this one has it all: subtle world building, marginal magical practices that turn out to have huge import, very minor canon characters being brought into the spotlight as well rounded players, and the weaving of dozens of subplots into the most amazing ending.