Amazon.com said on Monday it saw a surge in sales of its Kindle devices, helped by its new Kindle Fire tablet, on the crucial "Black Friday" shopping day after Thanksgiving.

"Even before the busy holiday shopping weekend, we'd already sold millions of the new Kindle family and Kindle Fire was the bestselling product across all of Amazon.com. Black Friday was the best ever for the Kindle family - customers purchased 4X as many Kindle devices as they did last Black Friday - and last year was a great year," said Dave Limp, Vice President, Amazon Kindle. "In addition, we're seeing a lot of customers buying multiple Kindles - one for themselves and others as gifts - we expect this trend to continue on Cyber Monday and through the holiday shopping season."

The Kindle family - the $79 Kindle, $99 Kindle Touch, $149 Kindle Touch 3G and the $199 Kindle Fire - are available now at www.amazon.com/kindle and at over 16,000 retail locations throughout the United States.

Kindle Fire offers more than 18 million movies, TV shows, songs, books, magazines, apps and games - such as Netflix, Hulu, Pandora and Angry Birds - as well as free storage of Amazon digital content in the Amazon Cloud, Whispersync for books and movies, a 14.6 ounce design, a color touch screen, a dual-core processor and Amazon Silk - Amazon's new web browser that accelerates the power of the mobile device by using the computing speed and power of the Amazon Web Services cloud.