A brief history of the Druids

Ellis, Peter Berresford.
New York : Carroll & Graf Publishers, 2002.

The bronze age and the Celtic world.

Peake, Harold, 1867-1946.
New York : Reprinted by Hacker Art Books, 1969.

Celtic dawn : the dream of Celtic unity

Ellis, Peter Berresford.
Talybont, Ceredigion : Y Lolfa, 2002.

The Celtic realms.

Dillon, Myles, 1900-1972.
[New York] : New American Library, [1967]

The Celts

Chadwick, Nora K. (Nora Kershaw), 1891-1972.
[Harmondsworth, Eng.] : Penguin Books, [1970]

The Celts.

Powell, T. G. E. (Thomas George Eyre), 1916-1975.
New York : F. A. Praeger, [1958]

Celts and the classical world

Rankin, H. D.
London ; New York : Routledge, 1996.

The Celts : Bronze Age to New Age.

Haywood, John, 1956-
Hoboken : Taylor and Francis, 2014.

Everyday life of the pagan Celts

Ross, Anne, 1925-
London : Batsford; New York: G. P. Putnam's Sons, 1970.

Myths & legends of the Celtic race.

Rolleston, T. W. (Thomas William), 1857-1920.
London : G. G. Harrap & company, 1911.

On the study of Celtic literature, and on translating Homer

Arnold, Matthew, 1822-1888.
New York : Macmillan and co., 1883.

On the study of Celtic literature, and other essays.

Arnold, Matthew, 1822-1888.
London : J.M. Dent; New York : Dutton, [1910]

The rise of the Celts.

Hubert, Henri, 1872-1927.
New York : Biblo and Tannen, 1966.

The Saxon and the Celt; a study in sociology

Robertson, J. M. (John Mackinnon), 1856-1933.
London : University Press, 1897.