Books about war hero Admiral Yi Sun-shin, who averted a Japanese invasion in the 16th century, are making it back on the bestseller list on the coattails of blockbuster "Roaring Currents."
Online bookstore Aladin on Tuesday said 1,400 copies of five books about Yi were sold in July, 67 percent after the film was released on July 27.
The average age of customers who bought the books on Yi is 39.8, and men and women were about evenly mixed.
Men in their 40s accounted for 18.6 percent of the total.
"The interest in the film led to interest in Yi as a human being, so the sales of books on the life of Yi are also going up," said an Aladin spokesman.