Antti & Neles is a collage of the lives of diploma-engineer Antti Nelimarkka and Neles Oy, and the post-war Finnish engineering industry. It is a book unlike any that has been made before. It is dilettantish and well-informed, subjective, highly subjective and objective, authentic and documentary, a book that is here and now. It tells how a device as small simple as the ball valve can grow through continual refinement into a celebrated, world-class product that verges on perfection, one that still works as it is, and as Antti Nelimarkka and his team developed it right from the start.