The following video is part of this week's MarketFoolery podcast, in which hosts Chris Hill, Charly Travers, and Joe Magyer discuss the latest business news. Microsoft made headlines by investing $300 million in Barnes & Noble's Nook, e-book, and college text businesses. So how worried should Apple and Amazon be? In this segment the guys analyze what the deal means for both Microsoft and B&N, as well as discuss how strong a threat the Microsoft-backed Nook presents in the tablet wars.

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Chris Hill owns shares of Amazon.com and Microsoft. The Motley Fool owns shares of Amazon.com and Microsoft. The Fool owns shares of Apple. Motley Fool newsletter services have recommended buying shares of Microsoft, Amazon.com, and Apple. Motley Fool newsletter services have recommended writing puts on Barnes & Noble. Motley Fool newsletter services have recommended creating a bull call spread position in Apple. Motley Fool newsletter services have recommended creating a bull call spread position in Microsoft. The Motley Fool has a disclosure policy. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. Try any of our Foolish newsletter services free for 30 days.