The 200 books show sequences of changing colours, each of them unique. Adjusting the ink manually during the printing process, Adrian Schiess covered each page of the book evenly with changing colours. From front to back on recto and from back to front on verso. Thus each book contains a sequence of colour, which represents the fraction of a superordinated sequence of colour. Colour is the leading actor: leafing through the book we experience the sensuous nature and unlimited potential of flowing colours. The books are signed and numbered on the glossy mirror-cover and contain a text by Max Wechsler on the reverse.