Microsoft has put forward an offer to buy complete control of Nook Media LLC, according to internal documents seen by TechCrunch. Redmond's joint venture with Barnes & Noble was set up last year to handle the Nook e-reader, tablet and college bookstore business. If the documents are accurate, Microsoft will dump the academic retail chain while retaining the digital arm of the partnership for $1 billion. The evidence also suggests that Nook Media will axe its Android tablets by the end of the 2014 financial year, concentrating instead on pushing the Nook store onto third-party devices including Windows 8 and/or Surface hardware. Simple Touch owners shouldn't be too worried, however, as the leaked documents state that Nook Media's e-reader division won't be killed off, as the technology is facing its own "natural decline." We've reached out to Barnes & Noble for something more official, and we're waiting to hear back.