I’ve never written a blurb for the back of a book. There’s good reason for this: I am not famous enough to help anyone sell their books and I am not really an expert on anything in particular. My understanding is that authors and publishers want those blurbs to come from people more well known than the author, people who will make readers stand up and pay attention. If we see someone we trust and respect encourage us to read a certain book, we’re much more likely to pay attention.
Which is why we ought to pay attention to the way God singles out and commends a few people in Scripture. When the Creator of the Universe calls you greater than all those born of women, like Jesus did of John (Lk. 7:28), we should take a much closer look.