How-to books may help to get you started but there is no perfect process for writing your dissertation. It is very important that you check with your mentor and your committee to get their points of view on the dissertation process.
Consider reading this article: Kamler, B. & Thomson, P. (2008). The failure of dissertation advice books: Toward alternative pedagogies for doctoral writing. Educational Researcher (8), 507. doi: 10.3102/0013189X08327390