Continuously updated and republished, this work is recognized as a classic in its genre. It remains unique in international 20th Century bibliographies for its ambitious and rigorous view of western philosophical trajectory, written by a single author without a school affiliation. The Catalan edition is offered in a new format based on the last French editions and is presented in three volumes: Antiquity and the Middle Ages , The Modern Era and The Contemporary Era . The bibliography has been systematically renewed, and special efforts have been made to provide ancient and medieval names in correct Catalan.