The fourth volume of the Kuraiyondrumillai book further elaborates about the depth of human existence and how one can achieve optimal spiritual enlightenment. He speaks about the core principles outlined in many scriptures and books. He shows how devotion plays a key role in attaining spiritual understanding. Through his wise words which are simplified to be useful to everyone, he makes clear points that are easy to follow while being detailed and full of wisdom. It is an excellent read for anyone who wants to walk on the spiritual path. Purchase from Giri UK.