Right now, Amazon is having a $20 off sale on the Kindle ebook reader, dropping the price down to only $49!

Note – this deal is valid only for today, Tuesday, December 17, 2013 until 11:59pm PST while supplies last.

– Less than 6 ounces – lighter than a paperback, fits in your pocket
– Hand-tuned fonts for easier reading
– Reads like paper with no glare, even in bright sunlight
– Download books in 60 seconds with built-in Wi-Fi
– Holds over 1,000 books – take your library wherever you go
– Massive book selection. Lowest prices. Over a million titles less than $4.99
– Hundreds of thousands of Kindle-exclusive titles that you won’t find anywhere else, including books by best-selling authors such as Kurt Vonnegut
– Supports children’s books and includes parental controls

Also, be sure to check out this month’s Kindle deals: 100 Kindle Books For $3.99 or Less, which includes Stardust by Neil Gaiman for $1.99; Stephen King’s The Shining for $3.99; The Last Policeman: A Novel by Ben H. Winters for $2.79; and Divergent by Veronica Roth for $3.99.

— You can gift Kindle books and set your gift to be delivered whenever you want to anyone with an email address. On the Product Page (on the top right side), click the button that reads “Give as a Gift.” From there you enter the recipient’s email address and note the date you’d like your gift to be delivered via email, and also include a personalized message. There’s also the option to have the gift emailed right to you that you can forward the gift email to the recipient yourself or print it out and personally deliver it to the recipient.

— You don’t actually need a Kindle device to read these ebooks. Books can be read on a Kindle or one of Amazon’s free reading apps for iPhone, iPad, Android, Windows PC, Mac, Blackberry, and Windows Phone 7.

Follow me on Twitter.