Among the biographical issues addressed in the catalogue are the artist's disputed birth date and his travels to the Southern Netherlands, where he encountered Albrecht Dürer and Jan Gossaert. The texts are supplement with exhaustive footnotes. The Appendix includes a discussion of Lucas van Leyden's appearance. The catalogue raisonné lists 17 authentic works by van Leyden; now-lost works known only from the documentation; 16th-17th c. copies after van Leyen, which have been included with extant originals; and rejected works. The catalogue raisonné is organized by subject: Old Testament, New Testament, Saints, Portraits, History painting, and Allegorical genre painting; but the illustrations are arranged chronologically.