In Invisible Oil, the artist Ernst Logar addresses the material petroleum and its importance as a basis of our modern civilization using the example of the Scottish petroleum metropolis Aberdeen. In the course of his work, the artist managed to get access to non public places of the North Sea based petroleum industry. The photographs taken and the correspondence with the petroleum companies, which are active there, are documented as well as the numerous artistic works developed and made of the material petroleum. These objects refl ect our modern civilization's dependency on petroleum and contemplate it in a haunting manner. The book also addresses the current economic and social situation of the oil-industrydominated city of Aberdeen and possible problematic future scenarios. In their essays, the renowned scientists Ernst Ulrich von Weizsacker and Hermann Scheer identify how to pave the way for the future in a sustainable way.