Pew: E-Reader ownership doubles in six months

The number of U.S. adults owning e-readers such as Amazon's Kindle doubled between November and May from 6 percent to 12 percent, with Hispanics and college graduates leading the way.

According to a survey by the Pew Research Center, 22 percent of college graduates now own an e-reader. In contrast, adoption of tablet computers such as the iPad grew just 3 percent between November and May, and stands at 8 percent of U.S. adults.

The report should quiet some of the concerns that the rise of the iPad has doomed e-readers, which are used to download and read digital books and periodicals. Numerous publications have rolled out iPad versions of their products in recent months.

There is some overlap between owners of e-readers and tablets — 3 percent of adults own both devices. Nine percent own an e-book reader but not a tablet, while 5 percent own a tablet but not an e-reader.

Both devices remain well behind cell phones, computers and MP3 players in terms of the most popular electronic gadgets in the U.S. All of those devices are owned by at least 44 percent of adults.