Samsung announced two 2-in-1 devices with Windows 10 at the Mobile World Congress in Barcelona which we handled on the spot. Now, they are available for purchase or pre-order in the United States. The Galaxy Book comes in two sizes - 10.6" and 12". The first is Wi-Fi only and can be bought at Samsung's online store and select retailers, including Best Buy, starting from $629.99 for the 4GB RAM + 64 GB storage version. There's also a variant with 128 GB eMMC, and the device has a microSD slot that can give you up to 256 GB extra storage. If the 10.6" is too small or if you are...
Source: http://www.gsmarena.com/samsung_galaxy_book_2in1_devices_now_available_in_the_us_-news-24663.php