A Vatican statement on Saturday said Francis had chosen fellow Argentine Archbishop Victor Manuel Fernandez to be the head of the Dicastery for the Doctrine of the Faith (DDF).
The powerful post of DDF prefect was held by Cardinal Joseph Ratzinger for 23 years before he became Pope Benedict in 2005.
"The kiss is a meeting of the two in a moment in which there is nothing else besides them, and nothing else matters," Fernandez wrote in the book.
The Vatican did not mention the book in the partial list of his publications it issued with the appointment announcement.
Francis succeeds Cardinal Luis Francisco Ladaria, a Spanish Jesuit, who is at the end of his mandate.
Persons:
Pope Francis, Francis, Victor Manuel Fernandez, Fernandez, Cardinal Joseph Ratzinger, Pope Benedict, Cardinal Luis Francisco Ladaria, Philip Pullella, Andrew Cawthorne
Organizations:
Catholic, Argentine, Pontifical Catholic University of Argentina, Spanish Jesuit, Thomson
Locations:
Argentine, Spanish