One way to help create a two-book deal is to make the last page of your proposal a one-page, single-spaced proposal for your next book. Give the book title and a list of chapter titles with a one-line description of each. At the bottom of the page, give the length of the book and how long it will take you to finish it. You may find a publisher who wants to start with your second book.
How to Write Scientific Fiction: Analyzing Michael Crichton’s Sphere
In this post, Dustin Grinnell explores the tactics that author Michael Crichton used to craft realistic science fiction within one of his most popular novels, 'Sphere.'