Self-Help/Popular Psychology: The core audience for Self-Help/Popular Psychology, which is the number one non-fiction category by a massive margin (20.4% of all adult NF volume; 16.1% of print, 23.8% of all non-fiction e-books, and 13.5% of audio).
Business/Economics: They heavily drive Business/Economics (5.9% of adult NF volume; 4.8% of print and 10.1% of e-books).
Family/Relationships: They heavily drive Family/Relationships (1.8% of adult NF volume; 1.5% of print and 3.2% of e-books).
General Fiction: They read General Fiction (19.6% of adult fiction volume; 21.3% of print, 17.0% of e-books, and 10.3% of audio).
Crime/Thrillers: They read domestic noir Crime/Thrillers (34.5% of adult fiction volume; 31.0% of print, 38.8% of e-books, and 15.5% of audio).