The vendors attribute climbing sales to demand for general non-fiction, children's books, travel, reference works and "midlist fiction" - novels that cater to adult readers.

He is a two-time winner of the Pulitzer Prize for general non-fiction.

Voices from Chernobyl was awarded the 2005 National Book Critics Circle Award for general non-fiction.

The main areas have been religion, children's books and general adult non-fiction.

Ferris has been nominated for the Pulitzer Prize in the category of general non-fiction for his physics and astronomy knowledge.

Instead, Tuchman was given the prize for general non-fiction.

The book was one of five finalists for the 1993 National Book Critics Circle Awards, in the category of general non-fiction.

It publishes general non-fiction but is best known for comprehensive illustrated information-based works.

Books published include biography, sport, humour, general non-fiction, fiction and children's books.

In 2002 it was a finalist for the Pulitzer Prize for general non-fiction.