Catalogue of the exhibition of Thomas Ruff's photograms and negatives at Gagosian Gallery in Beverly Hills (19 April to 31 May 2014). It contains a conversation between Ruff and Wenzel S. Spingler, with Valeria Liebermann, and sections on the photograms and on the negatives. The book was also published by Rizzoli in 2015. The photograms engage with the cameraless technique advanced by Man Ray and László Moholy-Nagy in the early twentieth century: the images depict abstract shapes, lines and spirals in seemingly random formations with varying degrees of transparency and illumination, and the objects and the light derive from a virtual darkroom built by a custom-made software program.