Microsoft's $300 million investment into Barnes & Noble has begun to bear fruit, as the company launched its first Nook reading app for Windows 8 and Windows RT devices.

This launch is an important milestone for Barnes & Noble, who formed a $300 million partnership with Microsoft to advance digital reading for consumers. It was uncertain how both companies would put the new partnership to work on Windows and other Microsoft-related products, with the Nook app now available in the Windows 8 Store, things are becoming apparent.

Barnes & Noble's digital reading library has over three million reading content, which is enough to entice any avid reader who is running Windows 8 or Windows RT. If this deal turns out to be successful in the long run, Nook could become the premiere reading spot for Windows 8, and even Windows Phone 8. On the other hand, Microsoft could go all out and purchase the whole Barnes and Noble business as the company needs to compete against Amazon and its Kindle service and devices.

One of the many good things about Barnes & Noble's Nook is that it has better support for comics compared to Amazon Kindle. This factor could be the tipping point for many readers who are slowly moving away from hard copy comics to a more digital lifestyle, which allows them to carry around as much comic content as they desire.

Visit the Microsoft Windows 8 store here to download the Barnes & Noble Nook application.