I first encountered this book in the late '80s. Since then, I've use the techniques from the book to write technical papers and documentation, employee reviews, published articles and winning proposals for million-dollar government contracts. I even used it to write testimony for a Congressional hearing.
The process outlined in this book is NOT a fad, and not "buzzword compliant", it's a proven, well-defined process that allows almost anyone to write like the best writers. These techniques will have you writing naturally, with clarity and focus.
These same techniques will also provide a big help in organizing your thoughts, and creating careful and insightful analysis.
For those who have trouble or anxiety about writing, having a well-defined process solves most of the problems with procrastination or "not knowing what to write, or how". This book provides that process. It simplifies the mechanics of "how" to write, so that you can focus on "what" to write, and getting your message across to the audience.
I'm glad this book is out in a new edition. I'll be buying copies for most of my technical staff, and suggesting it to my graduate students.