Kendra:  I study because it is required. The Slayer handbook insists on it.

Willow:  There’s a Slayer handbook?

Buffy:  Wait. Handbook? What handbook? How come I don’t have a handbook?

Willow:  Is there a T-shirt, too? ‘Cause that would be cool…

Buffy the Vampire Slayer, Season 2: Episode 10 – “What’s My Line, Part 2”