From The Introduction:
This book is a valuable link between theory and what instrument flying is really like. It's a book to read all the way through and also to have handy for those free moments, to open anywhere, and gain a useful piece of information.

It is difficult to dig out all the information about instrument flying. I've tried by reading stuffy technical books, the stiff FAA publications, and formal study courses designed to get one through the FAA exams. Even after all this digging, there is still a long way to discover what its really like. Mostly this comes from experience.

Instrument Flying cuts this process short because it tells, as it teaches what's behind the formal stuff. In doing this, the book gives experience. I wish it had been around years ago; it would have made things a lot easier.