" Hollis blew gently on the thin tan island of foam afloat in her half pint of Guinness, to see it move, then drank some. Always a mysterious beverage to her. Unsure why she’d asked for it. She liked the way it looked more than how it tasted. How would it taste, she wondered, if it tasted the way she thought it looked? No idea. "

― William Gibson , Zero History (Blue Ant, #3)