I did the same thing but on my Kindle. When I heard about the new book, I was interested (since I enjoyed The Art of Deception), and got the sample for my kindle. When I was finished with the sample, I quickly clicked the link to purchase the whole book.
I really enjoyed it. While I'm fairly knowledgeable about computers, I know very little about the phone system. He did go into some technical detail, but I never found it difficult to follow. I think people without a background in computers may find some of the technical details to be a bit much, the rest of the story is enough to keep anyone entertained. I really found his descriptions about social engineering to be fascinating. I thought it was funny that people would tell him that they were not supposed to do something because of this hacker that was causing problems, but then they would go right along and give him the information anyway.
I manage people who have to do money services, and social engineering is still alive and well. People have to go into all kinds of training on what not to do, and how not to get tricked into sending money fraudulently, but people still do it all the time.