General Fiction: The core buyers of General Fiction (19.6% of adult fiction volume; 21.3% of print, 17.0% of e-books, and 10.3% of audio).
Historical Fiction: Core buyers of Historical Fiction (5.3% of adult fiction volume; 4.6% of print, 5.7% of e-books, and 3.1% of audio).
Classic Fiction: Core buyers of Classic Fiction (6.0% of adult fiction volume; 6.9% of print, 4.6% of e-books, and 3.6% of audio).
History & Military: In non-fiction, they drive History & Military (7.6% of adult NF volume; 7.8% of print and 6.9% of e-books).
Social Sciences/Humanities: They drive Social Sciences/Humanities (7.8% of adult NF volume; 7.6% of print, 7.9% of e-books, and 3.3% of audio).
Science: They drive Science (3.1% of adult NF volume; 3.0% of print and 3.7% of e-books).
General Interest Non-Fiction: When buying for children, they purchase General Interest Non-Fiction (12.7% of children's volume; 12.8% of print and 14.6% of e-books).