Nook

Customers check out the Nook tablet at a Barnes & Noble outlet. The tablet has failed to win market share from Amazon’s hugely successful Kindle. Photo: AP

Barnes & Noble chief resigns after Nook sales slump

Barnes & Noble chief executive William Lynch resigned on Monday, an acknowledgement that its digital division Nook has failed to compete successfully in the e-reader and tablet markets and possibly presaging a further shake-up in the company.