You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: RULERS 
Clue: In 770 this king of the Franks married Desiderata, daughter of the Lombard king Desiderius
charlemagne

Category: BITS 
Clue: This cross-dressing comic from Britain, on Stonehenge: "No one's built a henge like that...since"
eddie izzard

Category: BROOKLYN IS BOOKLAND 
Clue: In a book by this author, "The Assistant" works in a Brooklyn grocery store

bernard malamud