The contributors, by category:
Cardinals
Cardinal Walter Brandmüller, Cardinal Raymond Leo Burke, Cardinal Gerhard Müller, Cardinal Robert Sarah, Cardinal Joseph Zen
Bishops
Archbishop Héctor Aguer, Archbishop Thomas E. Gullickson, Archbishop Carlo Maria Viganò, Bishop Rob Mutsaerts, Bishop Athanasius Schneider
Priests
A Catholic Priest, Abbé Claude Barthe, Abbé Christian Gouyaud, Dr. Michael Fiedrowicz, Dr. Martin Grichting, Fr. John Hunwicke, Msgr. Charles Pope, Dr. Gero P. Weishaupt
Religious
Dom Alcuin Reid, Cristiana de Magistris (pen name)
Laymen
Christopher Altieri, Phillip Campbell, David Deavel, Tomasz Dekert, Pietro de Marco, Juan Manuel de Prada, Michael Brendan Dougherty, Ross Douthat, Douglas Farrow, Edward Feser, Christophe Geffroy, Peter Kwasniewski, Phil Lawler, Jean-Pierre Maugendre, Daniel McGlone, Leila Miller, John A. Monaco, Sebastian Morello, Martin Mosebach, George Neumayr, Michel Onfray, Rubén Peretó Rivas, Matthew Schmitz, Joseph Shaw, Tim Stanley, José Antonio Ureta, Massimo Viglione
La table des matières complète ici.