This book is a fly's eye view of the first version of Windows NT. It is a page-turning read of what's it like to work on a major project. The book presents slices of life for people working in all aspects of the project and some important people inside Microsoft at the time. The book doesn't dig too deeply into the technical details of NT, but provides details of the challenges at a level someone with an passing interest in operating systems could understand. A thoroughly enjoyable read.