Good to have your company, Jacmac. Calibre library software (
http://www.calibre-ebook.com) will see you through and convert from PDF to the format of choice (in your case, probably ePub) IF a book isn't locked by DRM software. And excellent Sony hardware and superb Calibre software is a perfect partnership. There are dedicated sub forums here if you want fuller advice for Sony or Calibre. Luck and best wishes. Neil