Both collections were a collaborative project from the Library's Hispanic Division and the National Digital Library Program. Among these are soldiers' reminiscences about the conflict and short histories designed to acquaint an American audience with Puerto Rico in the earliest years of its affiliation with the United States. The collection comprises 16 monographs scanned from printed copies and 39 political pamphlets and two monographs and a journal scanned from microfilm.
All pamphlets are in Spanish.
Four of the books are in English and the rest in Spanish. The materials in the collection were selected by Edmundo Flores, a curator in the Hispanic Division.