Sony Corp unveiled its first wireless electronic reader, challenging Amazon.com Inc's momentum in the growing digital book market.

At $399, Sony's "Daily Edition" is $100 more expensive than Amazon's basic Kindle but it has a 7-inch touch screen and an aluminum body. It will go on sale in December with AT&T providing its 3G wireless Internet service.

After a year of headlines dominated by Amazon's Kindle reader, Sony has taken the offensive, with the wireless model joining previously announced lower-priced units.

More: http://www.reuters.com/article/technologyNews/idUSTRE57O40X20090826

............................................................................................