After you have finished writing the manuscript for your e-book, the first thing is to select a source format in which the source document would be created. The problem starts right with the document conversion as the main motive of the conversion is to preserve the the formatting and layout of source document into the actual e-book format. There is a huge list to choose from some of which two have been discussed in the following text.
HTML(.html) - It is one of the most widely accepted and used and almost all word processors can generate and read it. Moreover, features like hyperlinks, section headings, images, font handling, etc. are supported by HTML. The only problem is that HTML is very hard to work with and takes a lot of time.
MS Word(.doc or .docx) - Microsoft Word format is the most popular document format, and the prime reason is that one can read and write word documents in almost any device. Word supports almost everything starting from footnotes, chapters, formulas, images, etc. helping a great deal in the creation of a very attractive and presentable and then can be converted directly into an e-book.
PDF being the best document format for e-book, can be obtained from any of the two above mentioned source document formats. A pdf conversion software can help you to convert your documents from webpage in html to PDF and also convert word to pdf to create the best e-book.