Writing a Premise Statement--Why This Tip from Screenwriters Can Help Book Writers of Any Genre

In my online book -structuring classes, we always write a premise statement.  Most new writers have never heard of this focusing tool for books.  It's borrowed from the film world.  Screenwriters use it as their pitch line to sell movies to producers.

How does it help book writers--say, if you're writing a memoir or a novel or a nonfiction book?   

It …