Again, I want to clarify, that Bostick Communications is a messaging firm. They have NO relationship to the product you received, other than to handle a small part, but a time consuming part of the marketing process.
Did you get a return address with the book. That is the real client who merely used Bostick. You should contact the one who sent you the book and explain why you refuse to review the book.
Bostick could care less...But if you do this too often and Bostick starts getting feedback from their clients, they may require/request that you no longer be contacted for reviews.
I'd have to know more about the reason why you don't want to review to help further.