In this short book, bestselling authors J. Thorn and Joanna Penn share tips on how to successfully co-write a book and avoid the pitfalls along the way. It includes excerpts from their private co-writing diary, honest notes written every day on a fiction project that will help you on your own journey. Updated 2017 with a new chapter based on a four-author collaborative novel. What is co-writing? Benefits of co-writing * The difficulties of co-writing * Finding the right person to co-write with * Before you written legal agreement * Practicalities and process of co-writing and co-creation * Excerpts from Risen Gods co-writing diary * What happens if it goes wrong? * Other types of collaboration and co-creation * Tips for multi-author boxsets * Tips for managing a multi-author collaboration * Appendix 1: Example agreement