This is worth your time.
This is a book targeted for a specific audience: those folks interested in kink from bottom's perspective.
It tries to walk the line. Are you interested in getting laid, or finding a partner, or finding out if this headspace is right for you? The answers aren't here, but strategies for finding the answers are.
The organization of the book walks you through the basics: what are you looking for, what are you really trying to find out about yourself, how do you prepare yourself and your expectations for seeking out what you want or need? Jack's partner in writing is his slave, Patrick, who adds his own perspective to each chapter. Patrick's sections augment the chapter and occasionally reposition the chapter to make it more relevant to the bottom who is reading.
What do you get out of this book? Good advice. Things like, have recent experience and references; prepare yourself now, not when you meet a guy, for what you want to be doing; plug into community kink groups and be cautious of the "loner" who does not; do not assume that every kink relationship is the same as every other one, because there are as many kinds of relationships as couples. Working through the exercises at the end of each chapter is useful, to ask yourself (in the privacy of your journal or text editor) who you are, what you want, who you're looking for and who you're not.
If you work through the exercises and read Patrick's notes a couple of times while reading through the book, you'll have a richer experience and more useful lessons when you are done. Why? Because it slows you down and forces you to think through what you're reading. It sinks in more.