A fascinating journey through the development of the Unix operating system (and related tools and languages, such as C), told by someone that was there.

It does not go into much technical detail, though there are some source listings here and there, mostly focusing on an overview of the technical sides, as well as the social and organizational aspects that contributed to an environment of innovation.

The story of how such an influential system, that still echoes loudly in almost all major OSes today, is fascinating, helped along by an author that knows how to write about advanced subjects in an understandable and enjoyable manner.