Amazon's Kindle device is probably the best-selling dedicated ebook reader right now. Almost half a million books are available in Kindle format, which you can download straight to the device automatically if you buy from Amazon.
If you don't have a Kindle, but you want to experience the e-book concept for yourself, Amazon offers a free application for Windows that turns your PC into a Kindle. You can then download your e-books straight to the PC and read them there.
If you're lucky enough to have a real Kindle too, you can sync the PC software with your device. This means that your purchased e-books will be available on both devices, and metadata such as which page you're currently up to will also be preserved.
You can get the software at http://www.amazon.com/gp/feature.html/ref=kcp_pc_mkt_lnd?docId=1000426311. It runs on Windows XP and above, and the download is 9 MB. Follow the links from that page and you can also get similar software for the Mac, iPod, iPad and other devices too.
My thanks to reader Lex Davidson for letting me know about this. If there's a Hot Find you want to tell us about, see http://www.techsupportalert.com/content/submit-product-review.htm.