Public interest in art is encouraging the publishing of art books and exhibition catalogues, although many of these publications focus on the same subjects. Some 1,200 art books are published in France each year, selling on average some 6,500 copies. Two large publishers dominate French art publishing, but many others are also involved in producing quality art books including titles which help to fill the gaps left by the big general publishers. Because production costs are all but prohibitive, and because the size of the home market is limited, some of these publishers have published books with texts in more than one language, or as co-editions with publishers in other countries.