Creating a master document
The three most common scenarios for creating a master document depend on the current state of your document:
You have one existing document (a book) that you want to split into several subdocuments (chapters) that will be controlled by the master document.
You have several existing documents (chapters) by one or more authors that you want to combine into one book, controlled by the master document.
You have no existing documents but intend to write a long book containing several chapters, possibly by multiple authors.
We will look at each of these scenarios in turn.