Barnes & Noble Rolls Out Lighter Nook e-Reader

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Barnes & Noble unveiled a new Nook e-reader on Tuesday that weighs less than a paperback book and has a battery life of two months -- features designed to help it compete with and Apple.

Barnes & Noble, which introduced its first e-reader in 2009, has been trying to remake itself into a digital book seller to cope with readers shifting away from print books.

The latest Nook will sell for $139 and start shipping on June 10. The touchscreen device weighs 7.5 ounces, has a 6-inch display, and allows a user to look up words, highlight passages and adjust the font size. It can store up to 1,000 books.

The new Nook lands in a highly competitive market, where the iPad and the Kindle are battling with Barnes & Noble for customers who want to read books on small portable devices.

Barnes & Noble executives trumpeted the new Nook's simplicity, saying designers streamlined it, reduced the number of buttons and armed it with a "paper-like" screen.

"The is the most advanced e-reader on the market," chief executive William Lynch said on Tuesday.

The new Nook comes just days after John Malone's Liberty Media Corp offered to buy the bookstore chain for $1 billion. A source familiar with Liberty Media has said that one of the driving forces in the takeover bid is Liberty's desire to acquire the Nook franchise.