Preparing for Publication--Writing Your Book's Premise and Synopsis

A reader from Minnesota has gotten interest from a publisher, but the publisher has asked for a written statement of her book--often called a premise statement--and a longer synopsis with market analysis.  Hers is a nonfiction book that straddles memoir and investigative nonfiction, and she wondered about how to put these two items together. Her publisher was specific:

1. Descriptive statement. Please provide a 250-300 word description of your book that includes