Can you tell me about your book in 10 words or less? If you can't, figure out how to do it right now. Because people are going to ask you questions about your books. When they do, your answers need to be short and to the point. Otherwise, the person asking will lose interest...and they definitely won't read the book, then.
10 Words or Less
A story of deception, murder and self-discovery.
A world where life is already mapped out for you.
What happens when a world of lies comes crashing down?
Each one of those lines describes one of my books, and they do it in 10 words or less. If you feel any interest or curiosity at all about those lines, I've done my job. If someone asked me what is your book about, I could answer with one of these lines and call it day. And that's exactly what I would do. Save the much longer answer for the blurb. The shorter answers you get to use everywhere else.