Christoph Niemann is a visual columnist for The Times Magazine.

His work has appeared on the covers of The New Yorker, Newsweek, Wired and American Illustration. In 2010 he was inducted into the Art Directors Club Hall of Fame.

Niemann is the author of many books, among them "The Pet Dragon," which teaches Chinese characters to young readers, " I LEGO N.Y." and "Subway," which is based on "The Boys and the Subway," the first entry of the Abstract City blog. His most recent book, "Abstract City," includes the first 16 chapters of this blog, plus an essay on creativity.

Earlier this year he released Petting Zoo, an interactive and fully animated app for iOS and Android.

You can also find him on his website christophniemann.com or on Twitter: @abstractsunday.