title: Best Possible way to Store Data (Lot of Strings with Images) in android application
body: <p>I am trying to build a application which will be a Ebook kind of (Lot of theory &amp; diagrams) will be there.</p>
  
  <p>Now what i want to know is that since there are many ways of storing the data which one will be the best</p>
  
  <ol>
  <li>Storing in Database</li>
  <li>XML</li>
  <li>Or simple text files</li>
  </ol>
  
  <p>I am very concerned about the security of the data as well. Since this will be a paid app, i want the data to be secured and also be fast and convenient.</p>
  
  <p>Also, I thought of converting the doc files (Data) in to epub format &amp; then use epub api's to access the data and show it on the android app screen, will this be a gud idea to go for? as compared to the above ways? </p>
  
  <p>Which one will be more secure, fast, flexible &amp; easy!</p>