An author has come forward to say sales of his book contradict recent figures about how much the new Apple iBooks store is affecting Amazon's Kindle e-book sales.

J.A. Konrath, who is a popular fiction author, wrote on his blog that he sells 60 Kindle books for every iBook.

Apple CEO Steve Jobs recently said that the iPad, in conjunction with iBooks, had captured 22 percent of the e-book market, which has been dominated recently by Amazon. But Konrath contends that his sales aren't even close to Jobs' figures.

"Publishers might be looking at enriched or enhanced ebooks as their new big-ticket items to replace hardcovers," Konrath wrote on his blog. "But the major ebook retailer, Amazon, isn't set up for video. Kindle isn't even able to do color yet. That leaves Apple, and according to my numbers Apple is a very small part of the ebook market. I sell 200 ebooks a day on Kindle. On iPad, I sell 100 a month."

While one author's sales do not make an airtight case against Jobs' claims, it does point to the growing popularity of e-books as well as Kindle's continued dominance among readers.

Konrath is a huge proponent of e-books, not just for readers, but for authors, too. Instead of making the traditional author's rate of around 18% of profits, e-books can bring in 70% of profits directly to the author.