Penguin underground lines twelve stories from twelve authors

Name: Penguin Underground Lines
Vital statistics: Twelve books, one for each Underground line, to celebrate
the Tube's 150th anniversary
Height: when all twelve are stacked up: 47.6 inches
Idea for series: Penguin asked twelve people to tell their tale of the city in
15,000 words (or in one case, no words at all), each inspired by a different
tube line.
Defining characteristics: While the responses range from the polemical to
the fantastical, the personal to the societal, they offer something for every
taste. Read individually they're delightful small reads, pulled together they
offer a particular portrait of a global city.
Appearance: determined by the authors, who photographed/drew/picked
their cover image, chose their title and wrote the back cover copy, the
Penguin logo also takes an outing in the official colour of each tube line -- a
unique play with Penguin's design.