One of my favorite books is Blessed Are You: Mother Teresa and the Beatitudes, by Eileen Egan and Kathleen Egan, OSB (1992). When Pope Francis announced that Blessed Teresa would be canonized in 2016, I took the book out again.
Each chapter of the book offers a short meditation on one of the Beatitudes, Blessed Teresa’s own reflections on that Beatitude, and how she and her order – the Missionaries of Charity — lived that Beatitude.