Net sales for global e-commerce major Amazon totaled $61.09bn for FY2012, representing a 27% increase over FY2011.

Excluding currency fluctuations, the increase in net sales stood at 29%, year-on-year.

The retailer posted a net loss of $39m for the year, against profits of $631m in 2011; net loss for the year was attributed to the higher operating expenses.

North American sales for the company increased 30% while sales from international locations surged 23%.

Amazon founder and CEO Jeff Bezos remarked that the market was going through an expected transition phase.

"After 5 years, eBooks is a multi-billion dollar category for us and growing fast – up approximately 70% last year.

"In contrast, our physical book sales experienced the lowest December growth rate in our 17 years as a book seller, up just 5%," said Bezos.

For the second straight year Amazon’s Kindle was the most popular product with Kindle Fire HD, Kindle Fire, Kindle Paperwhite and Kindle occupying the top four slots on the worldwide bestseller charts.

The retailer, in 2012, opened Kindle Stores in Brazil, Canada, China, and Japan that offered customers a vast selection of local language books.

Over the course of the year, the retailer expanded its digital media selection to include 23 million items – movies, TV shows, songs, magazines, books, audiobooks, and popular apps and games, as against 19 million items at the end of 2011.

Looking ahead to 2013, Amazon expects to close the first quarter with net sales of $15-16bn.