The given charts illustrate the proportion of five different kinds of books, including adult's fiction, children's fiction, biography, travel and others, sold by a bookseller from 1972 to 2012.

The given charts illustrate the proportion of five different kinds of books, including adult’s fiction, children’s fiction, biography, travel and others, sold by a bookseller from 1972 to 2012. Overall, there was a downward trend in the percentage of travel, biography and others over a 40-year period, while the reverse was true for two kinds […]