Do you have an account on Goodreads? If so, there is a page for Seven Deadliest Unified Communications Attacks with a very kind review from Alan Johnston. As an author, I'd naturally like to have some more reviews as they do tend to help people understand what people think about the book.
If you found the book helpful, could you please take a moment to review (or at least "star") the book there?
Even if you don't want to post a review right now, if you are on Goodreads and can add the book to a "shelf" that would also be helpful, as others will then see that people are reading the book.
And while you're at it, if you'd like to connect on Goodreads as a fan/friend that would be welcome.
Thanks again for the continued support and for the positive comments I continue to receive about the book. I'm very pleased that people have found it helpful and that we can continue to have a healthy dialog about communications security issues.