A History of Unitarianism by Earl Morse Wilbur
A detailed, two-volume history beginning in the 15th century. Currently out of print but available online: Volume I and Volume II.

Unitarian Universalism Is A Really Long Name, Jennifer Dant
This fully-illustrated introduction to Unitarian Universalism offers youngsters useful and accessible answers to questions like Who Are We?, What Do We Believe? and Do We Pray?

We Are Unitarian Universalists, Marta Flanagan
An online pamphlet created by the Unitarian Universalist Association that gives a very broad overview of Unitarian Universalism.

Being Liberal in an Illiberal Age (1995 Edition), Jack Mendelsohn
An eloquent case for liberal religion, with a 2006 introduction by the author and a foreword by Reverend Scotty McLennan, dean for religious life at Stanford University.

Black Pioneers in a White Denomination, (3rd Edition), Mark D. Morrison-Reed
A look at the black experience in Unitarian Universalism. Contains stories of two pioneering black ministers and accounts from some of today's more integrated UU churches.

The Critical Way in Religion, Duncan Howlett
A history and defense of the critical as opposed to the ecclesiastical way in religion.

Divinity School Address, Ralph Waldo Emerson

The Epic of Unitarianism by David Parke
A documentary history of Unitarianism through the ages. Fascinating reading.

The Journal of Liberal Religion
An online theological journal devoted to the study of liberal religion published by the Meadville/Lombard Theological School in Chicago, Illinois.

Our Chosen Faith: An Introduction to Unitarian Universalism by John Buehrens and T. Forrester Church

Today's Children and Yesterday's Heritage, Sophia Blanche Lyon Fahs
A philosophical work that points out the importance of religious education.

The Transient and Permanent in Christianity, Theodore Parker

Unitarian Christianity, William Ellery Channing

Universalism in America: A Documentary History, Ernest Cassera
As the title indicates, a documentary history. Excellent reading.

On Being Human Religiously, James Luther Adams
The author's philosophy as a liberal theologian.

UU Origins: Our Historic Faith
An on-line pamphlet created by the Unitarian Universalist Association which details the history of Unitarian Universalism.

Unitarian Universalist Pocket Guide, edited by William Schultz
An accessible guide to UU beliefs, practices and history.

Many of these titles and more can be found at the Unitarian Universalist Association's on-line bookstore.