I purchased an ebook in Mobi format from a seller other than Amazon. I used the Send to Kindle application on my PC to send it to my Kindle device (strangely, by Kindle for PC was not on the list of options - more on this later). It was delivered to my device right away, and I happily read it. I made many highlights (as I often do), and I wanted to see those highlights on my PC to prepare some teaching notes. However, I discovered that the book did not appear on my Kindle for PC. I also checked my history of highlights at _highlights and they were not there either. I started to worry at this point, thinking that I only ever have access to my highlights on the Kindle device itself.