San Francisco's vibrant street art scene exists in areas off the city's well-worn tourist paths. The alleyways and hidden side streets of the Haight, the Tenderloin, and especially the Mission district's Clarion Alley offer unexpected treats to visitors lucky enough to stumble upon them. For more than five years, photographer Steve Rotman has obsessively documented this scene as it evolved on walls, sidewalks, billboards, fences, doors, and other public spaces. Culled from thousands of images, the result is a collection of work that attests to the artists' personal and stylistic diversity, from Mars1's robotic depictions of alternate universes which reflect the local counterculture spirit, to Neck Face's whimsically ghoulish creatures that serve as a testament to entrepreneurial hipsterdom, to Bigfoot's friendly green primates inspired by the area's rich graffiti culture. San Francisco's charm as an international destination also causes foreign artists to contribute to the street dialogue-Brazilian duo Os Gemeos, Londoner D*Face and German painter Dome have all graced the city's walls with their unique points of view. An enterprising photographer, Rotman has forged relationships with many of these often-reclusive artists, allowing him access to some of the lesser-known corners of the street art world.