People judge a book not only by its cover but by the blurb on the back of the book, therefore it's important to hook them in with the use of minimal words.
How do I know this? I am the published author of over 50 resources, fiction and non-fiction, so that means I've written over 50 successful blurbs for my books.
*please note* This gig does not include reading your manuscript, I will provide you with a questionnaire of which i can gain enough information about your story to write a successful blurb. With my own published resources most times I have written blurbs before I even start the story based on my planning, synopsis etc.