I have never asked anyone who has come to me, about his politics. I am just not interested! My attitude here demonstrates a fundamental fact about Opus Dei, to which by the grace and mercy of God, I have dedicated myself completely, in order to serve our holy Church. I am not interested in the subject because, as Christians, you enjoy the fullest freedom, with the consequent personal responsibility, to take part as you see fit in political, social or cultural affairs, with no restrictions other than those set by the Church's Magisterium.(The phrase "restrictions set by the Church's magisterium" refers particularly to the social teaching of the Catholic Church.)
Friends of God was one book I got at the CTS - it is available on Amazon UK but the wait is 4-6 weeks. The Way is sold by Amazon and currently in stock.