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.
Example: Category: WHO'S BUYING? 
Clue: YouTube, in 2006
Example solution: google
Example explanation: Google acquired, i.e. bought, YouTube in 2006 for $1.65 billion.

Problem: Category: ART SUPPLIES 
Clue: A pad of paper for quick drawings, it appears in a Washington Irving title along with Geoffrey Crayon

Solution: sketch book