The pie charts illustrate the percentages of readers from two different age groups (18-25 years old and 26-34 years old) who preferred various types of books at the A&Z library in 2009. The categories of books included science fiction, biographies, novels, and self-help books.
Overall, the most popular genre for both age groups was self-help books, although the younger group had a higher percentage in this category. On the other hand, novels were more popular among the 18-25 age group compared to the older group, while biographies saw an increased preference among those aged 26-34.
In detail, 58% of readers aged 18-25 preferred self-help books, making it the most significant category for this group, followed by novels at 23%, biographies at 10%, and science fiction books at 9%. In contrast, 42% of the 26-34 age group preferred self-help books, which was also the largest proportion, but smaller than that of the younger group. Biographies were notably more popular among this older group, accounting for 31% of their preferences, followed by novels at 20% and science fiction at 7%.
In summary, both age groups favored self-help books, though younger readers showed a stronger preference for novels, while the older group exhibited a higher interest in biographies.