The most likely book readers in the United States are high-school students, college-age adults and people in their 30s, with e-book use highest among 30-somethings, a survey released on Tuesday shows. Reuters reports that 78% of Americans had read at least one book in the previous 12 months, with the rate 83% among those aged between 16 and 29, according to the survey by the Pew Research Center's Internet and American Life Project.