I enjoyed this book very much. I think it helped that I am also a referee (local level), so it was useful to hear how one of the greats goes about it. But anyone interested in the background of this mysterious and much maligned profession will be interested in his insights.
The book doesn't read so much as an account of his life and career as a one sided conversation between Collina and a ghost writer. It's easy to picture the scene: Collina, writer, audio recorder in a room: "Tell me about your first match," "How did it feel being assigned to the World Cup final," "What is your preparation for a match." The answers are interesting, though I could have done a bit less with his observations about modern culture and politics, tbh.
A quick read, well worth it, helpful if you plan on watching or thinking about any sports in the future.