NATURE’S SECRETS REVEALED: SCIENTIFIC KNOWLEDGE OF THE LAWS OF SEX LIFE AND HEREDITY OR EUGENICS THOMAS W. SHANNON 1917
THE FACTS AND MYSTERIES OF THE CHRISTIAN FAITH; A BRIEF STATEMENT OF THE THINGS CHRISTIANS BELIEVE AND THE REASONS WHY THEY BELIEVE THEM ALBERTUS PIETERS 1926
CABALA, MYSTERIES OF STATE: IN LETTERS OF THE GREAT MINISTERS OF K. JAMES AND K. CHARLES. WHEREIN MUCH OF THE PUBLIQUE MANAGE OF AFFAIRES IS RELATED ; FAITHFULLY COLLECTED ANNE COVENTRY 1654
ESSAI SUR LES ACCUSATIONS INTENTÉES AUX TEMPLIERS, ET SUR LE SECRET DE CET ORDRE; AVEC UNE DISSERTATION SUR L’ORIGINE DE LA FRANCMACONNERIE FRÉDÉRIC NICOLAI 1783
SECRETS OF THE BRITISH SECRET SERVICE : BEHIND THE SCENES OF THE WORK OF BRITISH COUNTER-ESPIONAGE DURING THE WAR E. H. COOKRIDGE 1947
KEY TO THE HEBREW–EGYPTIAN MYSTERY IN THE SOURCE OF MEASURES, ORIGINATING THE BRITISH INCH AND THE ANCIENT CUBIT JAMES RALSTON SKINNER 1876
SECRETA MONITA SOCIETATIS JESU. THE SECRET COUNSELS OF THE SOCIETY OF JESUS… A DISCOURSE ON THE AUTHENTICITY OF THE WORK ROBERT J. BRECKINRIDGE 1835
THE MYSTERY OF “SHAKSPEAKE” REVEALED : SIR FRANCIS BACON, THE REAL AUTHOR WILLIAM HENRY CHURCHER 1886
THE JESUITS, A COMPLETE HISTORY OF THEIR OPEN AND SECRET PROCEEDINGS FROM THE FOUNDATION OF THE ORDER TO THE PRESENT TIME THEODOR GRIESINGER 1903
THE SECRET WORLD OF OPUS DEI: AN INVESTIGATION INTO THE CONTROVERSIAL SECT AT THE HEART OF THE ROMAN CATHOLIC CHURCH MICHAEL WALSH 1989