Some publishers are kind enough to have some poor editor create the snazzy, tantalizing blurb you find on the back of the book. Others leave it up to the author. So if it’s in the author’s hands, she must to write something that is going to make readers buy her book. The blurb is generally just a paragraph or two, about one hundred words long. Most of the time, it presents the central conflict, e.g. Jane finds a dead body, is discovered standing over it, and is arrested as the prime suspect.
Right before the book is released, there is a flurry of activities.