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.
Full story at Publisher’s Weekly
Kindle
There are two major readers on the market. The Sony Reader and the Kindle. The Palm eBook store also sells Penguin titles.
Since Kindle is the new player in the market I would attribute this jump in sales to the Kindle.