Mary and Frank Yturria donated the money for the volumes. The work is considered a valuable resource for historians because Zamacois used documents and archives now inaccessible or that no longer exist. He also used newspaper accounts and letters, along with the other research material to patch together the extensive work. One of the valuable things in the collection is that Zamacois, used a good amount of primary sources . He also said that since Zamacois was a Spaniard and lived in Mexico for many years, the works provide a unique perspective on Mexican history.
Plans are also in the works to translate parts of the volumes that relate to local history.
The volumes are considered rare and can only be found in the research departments of some of the larger libraries.