The Los Angeles Branch of the National Archives is located at Laguna Niguel, Orange County, California.

This book opens the world of published and archival materials about California to those who wish to investigate and research the rich history of this state. Each of the essays elaborates specific periods, topics, or holdings and has been authored by an expert in the respective field or institution. Part I is both a chronological and topical approach to the essential elements that have shaped California's history. Attention is given to its varied ethnic groups and how the state developed. Part II contains essays on the archival and manuscript holdings of the major research centers in the state. Also included are the included are the holdings of smaller historical societies and libraries. Wherever possible, essays contain references to documentary sources, including photographs, as well as printed sources. Archival materials have been preserved from the state's earliest days and most of these are located within the state. An introduction by the editors is followed by the historical and topical articles in Part I. From Spanish to Mexican rule, to becoming a U.S. territory, through statehood and beyond, the history of California is covered in depth. There are also essays on California Chicanos, blacks, Asians, and women, along with a study of urban areas. Part II contains information on such national archives as federal records centers, the California State Library, and the Huntington Library. A directory of oral history is presented. The appendices follow with a chronology of California history and lists of organizations interested in the state's history. A Guide to the History of California is an indispensable book for those with a special interest in the state and students enrolled in courses on the history of California.