title_body: How do I get permission to use pictures in my ebook? My first ebook contains a few historic pictures that are not marked for commercial re-use.
  
  a) What should I do to get permission to use the pictures?
  
  b) What price is appropriate?
  
  c) Sometimes I can not find out who the owner of the rights on the pictures is.
upvoted_answer: To get permission, you need to contact the rights-holder. Unless it is unequivocally licensed for reuse by the original rights holder or in the public domain, you can't just use it. Note that just using Google image search to find images marked for reuse is not sufficient&mdash;anyone can post images to the web, and frequently people post images they don't have rights to. If you cannot find the rights-holder, then you cannot use the image.
  
  Price will be subject to negotiation&mdash;ultimately, it's the rights-holder's call what they think they can get.