Maybe not the proudest, but I thought I was pretty clever when I was younger... Years ago I spent a lot of time trying to figure out how to get a Kindle to "Wh

Maybe not the proudest, but I thought I was pretty clever when I was younger... Years ago I spent a lot of time trying to figure out how to get a Kindle to "Whispersync" sideloaded books. Eventually I figured out it was as simple as having an ASIN included in the books metadata (Calibre does this automatically now, but it was fun figuring it out manually with Python scripts). Originally I thought the ASIN had to be valid, but eventually realized it didn't even matter, just had to match the pattern.