Penguin has reported that e-book sales from the first four months of 2008 have surpassed the house's total e-book sales for all of last year. According to the publisher, the spike is "more than five times the overall growth in sales, year-on-year, through April 2008." Penguin Group CEO David Shanks said he attributed the jump, in large part, to the growing popularity of e-book readers.
That said, the publisher has been doing its part to add premium features to its electronic content. To that end, the house is developing properties like the Penguin Enhanced e-Book Classics; the first title in that series, Pride and Prejudice, will debut this summer and include such bells and whistles as reviews (of the original publication), a filmography, recipes and notes on etiquette. Nine more titles will be released as Enhanced e-Book Classics throughout the fall.