Microsoft Corp. and Amazon.com Inc. said they are teaming up to sell digital books in the latest boost to the electronic alternative to paper and ink. Amazon would use a customized version of Microsoft's Reader software for downloading and displaying text on a personal computer or hand-held device, the companies said. That is a major step by Amazon, the No. 1 Internet bookseller, toward opening a digital bookstore and making its debut in the nascent industry. Microsoft closed up 69 cents at $71.31 and Amazon closed off 81 cents at $39.13, both on Nasdaq.
