For a publisher in inspirational books Joost created a magnificent book concept that kills two birds with one stone. The idea—originally developed for life coach Bob Proctor—is as follows. Say you would like to publish a book with 99 motivational stories. You simply invite your clients to become co-authors with you. Your co-authors write their own life-changing tale and you in turn promise them their own customized copies of your book including their stories! Modern printing techniques allow for individual books to be printed in small editions. Each client will buy his own set of books for friends and family. Success goes both ways. Your client will be proud and happy to have been published in an inspirational book and you will be able to sell many more copies than with the old-fashioned way! Joost created an app for this book concept that is easy to use for both the authors and the publisher.