Complex sentence: UEA publishes books and has the largest mail-order Esperanto bookstore in the world (with over 6000 books, CDs and other items), maintains an information center and a significant Esperanto library, called the Hector Hodler library.
Split into simpler sentences: UEA publishes books and has the largest mail-order Esperanto bookstore in the world (with over 6000 books, CDs and other items). It also maintains an information center and an important Esperanto library, called the Hector Hodler library.