title_body: What software should I use to write books, which can be exported to Lulu and CreateSpace?
upvoted_answer: For CreateSpace you essentially need to provide a PDF and do the layout by combining your output with images in the form of PDF output. To conform to their formats, you would still need a template for the editing software that you use, that generates a PDF that can be merged with such templates (and not come into the margins as they warn you not to).
  
  The CreateSpace forums give some, but IMHO not very much more helpful tips (e.g. here)
  
  It looks like CreateSpace is more reader-customer oriented and not so much bookwriter-customer, I had more help from the publisher for the single book that I helped typeset that made the shelves, and I was the first generating electronic input (from LaTex) for them.