This book discusses a topic and then provides examples where it asks you to select the best moves. It's not saying that there is a mate at the end but that you must select among the candidate moves. It then goes over which moves are better and why.
I find this book rather unique in that it forces you to look at the whole board and think as though your were playing as opposed to letting you just seek out a single answer that you know is there. To put it in perspective, Reinfeld’s 1001 Brilliant Ways to Checkmate which everyone seems to have at one time or another is the type of tactics book I just can’t stand.