From the 3rd September to 14th September 2014, Urban Spree Gallery presented the first solo show and book release of the iconic Kreuzberger & world-famous graffiti crew ONE UNITED POWER. The show is also the occasion for the crew to publish their first book “I AM 1UP”, 140 pages of pictures from their private archives, self-published, full of behind-the-scenes action, an exceptional volume that is poised to become a milestone in graffiti documentation in the first decade of the 21st century. See more images after jump.