In this book are presented descriptions of 66 manuscripts, one for each year Árni Magnússon lived. Half of these 66 are now housed in Copenhagen and the other half in Reykjavík. There are contributions by 35 scholars from eleven countries, each in some way connected to one of the two institutions which bear Árni Magnússon’s name. High quality colour photographs complement the texts. Descriptions and pictures of a selection from the many diplomas found in the collection have also been included, along with a comprehensive introduction to Árni Magnússon’s life and work and a chapter on book productions in the Middle Ages.