After the Architect’s Book, the Grey Book is the first in a series of books about modern architecture, with which Viero continues in its mission to provide sources of inspiration for contemporary living, interior design and decoration. The Greybook can be seen as a monochromatic manifesto about the aestheticism of grey. Its purpose is to highlight what can be named as the main architectonic function of the wall, that is to create and define spaces. Not only does the color grey serve as a perfect background to modern and linear spaces, but it is also a stationary element which balances and generates equilibrium. Grey is the medium through which the characteristics of essential and neat interiors are outlined. Perception without any distortion creates a calm atmosphere which confers uniformity to spaces. With its expressionist scenery and narrated images the Greybook introduces the aesthetic and sensory qualities of the color grey in contemporary architecture. The Grey Book is a collection of decorative paint plasters developed as an ispiration to planners, interior designers ad decorators.