With so many development teams adopting the Agile process, documenting these features that are being worked on in parallel (often by multiple teams, even though the writer is tasked with incorporating all their work!), I need a way to work on separate branches of docuemntation of the same book (and sometimes the same chapter file in a book) so I can also work in parallel, but incorporate, generate and release changes sequentially.
Am I the only writer with this problem or am I just not using the right search terms?