If I want to write an eBook and sell it after that, what must I do to make it legal. There is OpenOffice.org and programs that convert .doc file into .pdf files, so can I just start writing the ebook and sell it after that? 10x for your help.
If the content you write is originial and your own, just simply copyright the content and your away!!
If you are in the US, all the information you need is at the US Copyright office: http://copyright.gov/