People would love to know about the author, his experience, expertise, etc before purchasing the book. Here, you can write a few lines about the author an his achievements. No one will want to miss a book written by an expert with some valuable and helpful content. Therefore, don't miss a thing. Mention everything that will impress the crowd.
This can include his qualification, the fields he has worked in, his innovations, awards, expertise, interests and everything else that you want people to know.