Cooper Bartholomew Is Dead question

Am I the only one who is constantly being decieved by the blurbs on the backs of books??? I just recently read a book that had a blurb that was midly interesting but the actual book itself was amazing. Another blurb I read aounded absolutely amazing, but the book itself was midly interesting.
Am I the only person who has read a blurb thinking it is okay, or pure brilliance only for the book to turn out the complete opposite???