Reader Enid Hartman has recently obtained her first ebook reader and has a question. She writes:I recently purchased Amazon's latest Kindle Paperwhite. It's my first Kindle and I'm really excited about putting ebooks on it. I've visited Project Gutenburg and downloaded some Kindle-compatible ebooks but I can't figure out how to transfer them to my Kindle. What's the secret?Bundled with your Kindle is a USB cable (regrettably these new Paperwhites don't additionally include a charger, though you can use your computer's USB port or an iOS device's charger). String this cable between your Mac and the Kindle. In short order you'll see a Kindle volume mount on your Mac's desktop. (If you don't see it, choose Finder > Preferences > General and enable the External Disks option.)Double-click on this volume