"“Ignatius Press published the text as we received it from the French publisher Fayard. Fayard is the publisher with whom we have collaborated on three other Cardinal Sarah titles. The text we received indicates the two authors are Benedict XVI and Cardinal Sarah. That text also indicates that Benedict XVI co-authored an introduction and a conclusion with Cardinal Sarah, as well as his own chapter on the priesthood, wherein he describes how his exchanges with Cardinal Sarah gave him the strength to complete what would have gone unfinished,” Mark Brumley, president of Ignatius Press, said in Jan. 14 statement.
“Given that, according to Benedict XVI’s correspondence and Cardinal Sarah’s statement, the two men collaborated on this book for several months, that none of the essays have appeared elsewhere, and that a joint work as defined by the Chicago Manual of Style is ‘a work prepared by two or more authors with the intention that their contribution be merged into inseparable or interdependent parts of a unitary whole’, Ignatius Press considers this a coauthored publication.”"