The Pew Research Center published a survey Friday that reports around 12 percent of e-book users 16 years and older downloaded a text from the library over the past year. Earlier in 2012, Pew issued a study showing that around 20 percent of adults had read an e-book recently.

Simon & Schuster, the Hachette Book Group and other major publishers have limited e-book offerings to libraries or refused to make any available, citing concerns that the ease of free downloads would hurt sales. Lack of awareness may be another factor. Around 60 percent of those 16 and older couldn't say whether their libraries had e-books.

Pew's Internet & American Life Project study, conducted with nearly 3,000 respondents between Nov. 16 and Dec. 11, 2011, suggests that library patrons trying to borrow digital texts have been deterred by the selection and by not having the right e-book device. Just over half of respondents said their library did not have the book they were looking for and nearly 20 percent found that the device they owned could not receive a given title.