Many "how-to" explanations for publishing ebooks say to begin with your Word document. Because we were republishing a published book that had been professionally edited and copy edited, I didn't have a Word document that was exactly what was in the published book. We made editing changes directly onto the last manuscript I sent my editor. We made changes on the publisher's created copy. We made minute copy changes. In order to truly republish STP&S, I couldn't use anything I had on my computer.