Ever since he published “entropix” in 2008, Taisuke Koyama has been consistently capturing the boundary between urban cities and nature. Through his practice, he has been expanding the framework of photography and exploring experimental expressions that question the ways in which photography exists in the digital age. This book is a first anthology introducing “Rainbow Variations”, a series which Koyama has been working on since 2009. It includes comprises 70 images, including “Rainbow Variations” in which he tries to transform and iteratively amplify the photographic images of a “rainbow as an artefact” created by macro-photographing rainbow-colored publicity posters, as well as his newest series “Pico”. The book was edited and designed in collaboration with Swiss designer duo, Maximage.