title_body: How can I change color of my e-book? How can I change the font or background color of my PDF e-book. I use Adobe reader v10 and it has no default option to change this. 
  
  Is there a way to edit the e-book to change the font or background color?
upvoted_answer: Taken from here:
  
  
  Open Adobe Reader. Go to Edit - Preferences - Accessibility.
  Make sure the "Replace Document Colors" is checked and click on Custom Color.
  Click "Page Background" color and then select "other color."
  
  
  I don't know if the version of Adobe Reader matters or not (or if it matches what you have).
  
  You could also consider using a different PDF view. I personally perfer SumatraPDF. It has a settings.txt file that you can edit to customize the text, background etc., which can be accessed via Settings > Advanced Options (options your default text editor for txt files).
  
  NOTE: I am using SumatraPDF v2.4