Working as a collective since 2000, the artists gerlach en koop apply repetition, copying, or reuse to render things visible. Through displacement and misplacement, omissions, erring, and making mistakes, they enact their fascination with the minute differences between two identical things. The smaller the distance, the more interesting a thing can be. Using objects, readymades, architectural interventions, sculptural or graphic images, words or gestures, they create works that are both straightforward and sophisticated. This book is the first volumes in a series, and is published on the occasion of the eponymous exhibition at de Appel arts centre in Amsterdam in fall 2015.