\' Graham Greene \'s beautiful and disturbing novel is filled with tenderness, humour, excitement and doubt\' The Times A leak is traced to a small sub-section of the secret service, sparking off the inevitable security checks, tensions and suspicions.. \' Graham Greene \'s beautiful and disturbing novel is filled with tenderness, humour, excitement and doubt\' The Times A leak is traced to a small sub-section of the secret service, sparking off the inevitable security checks, tensions and suspicions.