Oprah Winfrey and Tom Brokaw are among the featured commentators for an "enhanced" e-book of Harper Lee's "To Kill a Mockingbird."
The e-book was released Tuesday by HarperCollins. It also features a 1964 radio interview with Lee, who rarely speaks to the media. The regular e-book for "To Kill a Mockingbird," Lee's only novel, came out in July. She had been one of the last major authors to withhold electronic rights.
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HarperCollins spokeswoman Tina Andreadis says the new "Mockingbird" edition had received 6,500 pre-orders, far more than for the usual "enhanced" book. She says the publisher has sold 80,000 copies of the regular e-book, a figure comparable to print sales. Total worldwide sales exceed 30 million copies since the book's 1960 release.
Both e-book editions are priced at $8.99.