Yahtzee -
Destination Unknown
Fandom: BtVS
I'm not always a fan of the Buffy/Giles fic for reasons that are probably obvious (unless you're a fan) but this one is outstanding for a number of reasons. Firstly it establishes the relationship in a very gentle and believable way. Secondly, and far more importantly, because it is so wonderfully full of joy. If you're after a happy ending (well, for all except Willow) then this is a must read.
Length: medium
Rating: MA
Pairing: Buffy/Giles