The ebook Authentic Book of Christian Quotations edited by Robert Adams is a compilation of over one thousand quotations by Christians from Augustine to Zinzendorf. Arranged alphabetically, the quotations "are expressions of truth, as their authors have come to see that truth, in compact and vivid language. They can be read as literature, but like all great literature, they require the reader go further and consider the truth presented in the larger context of our faith and knowledge of God, Scripture, and our experience of the world." Each quotation comes with recommended Bible verses to aid the reader in understanding it.

Robert Adams started the Christian Quotation of the Day, which publishes a quotation from one of the thinkers and writers of Christianity each day. Adams father compiled many of the quotations used in the book and in the Christian Quotation of the Day.