Print leads, but its share has slipped64% of U.S. adults had read a print book in the past 12 months, compared with 31% who had read an e-book and 26% who had listened to an audiobook. Print is the only format a majority of Americans use. Only 7% of adults say they have participated in a book club in the past 12 months, according to the October survey. Print continues to be the only book format used by a majority of Americans. Roughly two-thirds of adults say they have read a physical book in the past 12 months, according to the October survey.