From Yarn Bombing: The Art of Crochet and Knit Graffiti, published by Arsenal Pulp Press in 2009 and written by Mandy Moore and Leanne Prain, who live and knit in Vancouver and at yarnbombing.com.

The knitted Pink M.24 Chaffee by Marianne Jørgensen.

Magda Sayeg a.k.a PolyCotN, co-founded the first yarn graffiti crew, Knitta (knittaplease.com), and covered a bus in crochet in Mexico City in 2008. Photo courtesy of Dan Fergus.

Tree Sweater. Photo courtesy of Jeff Christenson.

Hase, Gelitin 2005. Photo courtesy of Gelitin.