POPE FRANCIS’s green encyclical, Laudato Sì: On care for our common home, has been published with a commentary by Sean McDonagh (Orbis/Alban, £16.99 (£15.29); 978-1-62698-173-7).In his book The #Tweetable Pope, Michael O’Loughlin, with reference to papal tweets, shows how they outline Pope Francis’s thoughts and priorities (Lion, £7.99 (£7.20); 978-0-7459-6856-8).