title_body: how to convert a wikibook to e-pub or mobi?
upvoted_answer: One way is to use EpubPress to make an EPUB and then open it in Kindle Previewer and export it as a MOBI file.
  
  An issue I found is that opening each page of the SQL book individually results in too many tabs for EpubPress to process. It can process the single-page version you get from one of the printable version links on the book's main page, but then the pages won't be listed individually in the EPUB's contents.