Amazon has started selling its Kindle online in Brazil, expanding from e-books into retail for the first time in Latin America’s biggest and most challenging e-commerce market. By shipping its e-reader devices across this immense country, Amazon will now get a taste of Brazil’s notorious logistics problems, widely seen as a deterrent for a full-fledged retail operation like the one it has in the US. The world’s largest online retailer launched an Internet bookstore in Brazil in 2012, a low-risk landing on this $11 billion emerging e-commerce market.