I'm one of the authors (Ed); my son Michael is the other. Here's the official description from Prometheus:

Opponents attack the president of the United States for not being a real Christian. Bitter arguments erupt over whether the United States is or should be a Christian nation. Sound familiar? These contentious issues are not just recent developments but were also the topics of fierce debate in the late eighteenth century. Like President Obama today, President Thomas Jefferson had to contend with accusations that his religious convictions were questionable. Against complaints that the writers of the Constitution did not invoke God, John Adams replied, “It will never be pretended that any persons employed in that service had interviews with the gods.”

In Freedom We Trust covers these and other related issues from the two-centuries-long debate over religion and secularism in America. Taking an unabashedly atheistic point of view, authors Edward M. and Michael E. Buckner argue that everyone—from evangelical Christian to ardent atheist—needs a secular America and separation of church and state. They examine the decidedly unchristian roots of the Fourth of July, the important difference between “tolerance” and “tolera- tion,” the misleading confusions related to the difference between “public” and “governmental,” the value of secular schooling, the erroneous contention that atheism is equivalent to immorality and therefore dangerous, and a host of other contemporary and historical topics.

With a list of key dates related to the history of secular America, notes, bibliography, and glossary, In Freedom We Trust offers important facts and arguments for secular humanists and anyone with an
interest in freedom of conscience.

EDWARD M. BUCKNER (Smyrna, GA), formerly the president of American Atheists and executive director of the Council for Secular Humanism, is now a member of the board of directors of American Atheists. He contributed to The New Encyclopedia of Unbelief (edited by Thomas W. Flynn) and the Fundamentals of Extremism: The Christian Right in America (edited by Kimberly Baker), among other publications.

MICHAEL E. BUCKNER (Decatur, GA) is the coeditor of Quotations that Support the Separation of State and Church, with Edward M. Buckner, among other publications. He is the vice president of the Atlanta Freethought Society.