Benke Carlsson is a photographer and author living in Stockholm, Sweden. He is one of the men behind the biggest web site on Scandinavian street art. Carlsson is the author of the books Street Art Stockholm and Swedish Punk 1977 to 1981. He is the founder of the PR firm Publik and a well known lecturer and educator within communication and culture. Hop Louie is a street artist living in the UK. He has worked in public spaces, mainly with stickers and posters, since the late 90s. In 2009 Hop Louie made the illustrations for the CD book Boven i Dramat together with rapper Max Peezay. Hop Louie is also featured in the book Playground Sweden (2007, Dokument Press). The internet site Wooster Collective was founded in 2001. The site is dedicated to showcasing and celebrating ephemeral art placed on streets in cities around the world.