Outgoing Barnes & Noble CEO William Lynch shows off the company's NOOKcolor device at an event in 2010.
Lynch is departing after a three-year tenure in which Barnes & Noble was battered by the shift away from brick-and-mortar bookstores to e-commerce and digital products.
The company has tried to compete in the tablet market with the likes of Amazon's (Fortune 500) Kindle and , Apple's (Fortune 500) iPad, but sales of its Nook tablets have disappointed, , falling 34% in the most recent quarter.
Overall, Barnes & Noble (Fortune 500) reported a quarterly loss last month of $118.6 million, nearly double its loss from a year prior. Revenue fell 7.4% to $1.3 billion. ,
Lynch's resignation is effective immediately. Barnes & Noble spokeswoman Mary Ellen Keating said Monday that the company "is in a transition period, so we have we have no immediate plans to name a new CEO."
Chief Financial Officer Michael Huseby has been appointed president of Barnes & Noble Inc. and head of the company's Nook division. Huseby and Mitchell Klipper, head of Barnes & Noble's retail division, will report directly to the company's executive chairman, Leonard Riggio.
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