Amazon's profits jumped 68% in the third quarter of 2009, exhibiting strong growth that was led by its Kindle e-book.
Its results statement showed profit increased from $199m in the third quarter, compared to $118m in the third quarter last year.
Net sales grew 28% from $4.26 last year, to $5.45 this year. Jeff Bezos, founder and CEO of Amazon.com, said: "Kindle has become the bestselling item by both unit sales and dollars - not just in our electronics store, but across all product categories on Amazon.com."
The company has continued to expand its web services business. It has launched the Amazon Virtual Private Cloud (VPC), which it describes as a "secure and seamless bridge between a company's existing IT infrastructure and the Amazon Web Services council". It says the VPC enables enterprises to connect their existing infrastructure to AWS resources.
Amazon's Web Services provides developer customers with access to in-the-cloud infrastructure services, which are based on the company's own back-end technology platform.
The services can be used to build almost any type of business, the company says. Services already offered include a simple storage service, a queue service, and a flexible payments service.
The company has dropped the price of its Kindle devices from $279 to $259. The US Kindle store now has more than 360,000 books, 7,000 blogs and more than 90 newspapers and magazines.