This book is around how the recruiting industry operates and it is quite relevant to anyone, because it’s likely that one would be approached by a head-hunter or a recruiter once in their career. It talks about the difference between a retainer recruiter and a contingency recruiter (The former is paid regardless of the end result. The latter is paid only if the person gets hired.)
The book talks about why the recruiting industry operates in this way, what kind of benefit should one expect from a retainer recruiter or a contingency recruiter, and how to act to benefit both parties.
It’s not necessary to read this very thoroughly. The author does a good job of repeating important points throughout the book. Overall it’s quite useful and saves me a lot of time in the future when I interact with any recruiter.