Many think about writing a scholarly textbook years before actually picking up the pen to do so. That prelude is like musicians tuning up before a performance. It is an investment of time that is as critical to finishing a book as to beginning it. For a writer, the prelude is a time to organize notes and references. To draft and redraft a table of contents. To organize notes. To connect with potential editors. To investigate potential audiences and find colleagues who would consider adapting it in their teaching. The prelude contributes to the ease with which you can write the book and lays the foundation that there is an audience for it.