From USA Today:
It’s reflected on USA TODAY’s Best-Selling Books list, which tracks combined sales of e-book and print editions. The latest list, based on sales data from Dec. 26 to Jan. 1, shows a remarkable burst of digital book sales after e-readers were unwrapped as gifts — for 42 of the top 50 titles, the e-book editions were the most popular format. The previous high, in July, was 25 of the top 50.
For e-books, “the two weeks after Christmas is what the two weeks before Halloween is to pumpkins,” says Michael Norris, an analyst with Simba Information, a market research firm. After the post-holiday surge, he predicts, e-books will increase in “short bursts and slow trickles” the rest of the year.
Norris estimates that one in five U.S. adults are reading e-books on a variety of devices, from dedicated e-readers to tablets (like the Kindle Fire) that can be used to download movies, music, video games and more.