The Kobo eReader Touch, left, an Amazon Kindle, an Aluratek Libre Air and a Barnes & Noble Nook. (RICHARD DREW/ASSOCIATED PRESS)

The total number of adults with e-readers doubled between November 2010 and May 2011, from six to 12 percent, the study found. That figure far outstrips tablet adoption, which has seen only a three percentage-point jump in the same period.

Despite the impressive growth, it’s not surprising that both tablets and e-readers have lower adoption rates than do other gadgets such as cellphones, computers and MP3 players.

But these numbers bode well for e-readers that offer a little more — the feature phones of the tablet world — like the Nook Color or the rumored Amazon tablet, which offer some of versatility of tablets without the hefty price tag.

Other interesting tidbits from Pew’s latest gadget use study found that, of all adults, 9 percent own a e-reader but not a tablet, 5 percent own an tablet but not an e-reader, and 3 percent own both.

The study also found that parents are more likely to own an e-reader than non-parents, and that men are more likely to own tablets than women.

Update: We corrected the statistics in the second-to-last paragraph to add up correctly. Thanks to commenter BobbQ3 for the catch.

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