This question does darn near everything. You find out if the person reads regularly (it’s my strong bias that they SHOULD). You learn a bit about his personality. You get to check if he really gets the company ethos and the culture. You can start to gauge whether or not he’d mix well with the existing team. And you get a book recommendation out of it whether or not you hire the person or not! Win^5
Source: This great list of unconventional interview questions from On Startups by Dharmesh Shah.
Have you asked this question? How did it go? Do you have advice for how best to ask it? PLEASE RATE! AND WRITE A REVIEW (in the comment box below)!