A book about The Gospel of St Thomas

The Gospel of St Thomas, discovered 1945 in Nag Hammadi, consists of 114 saying of Jesus - Logia, several of which have been parallell in the Bible with the synoptic Gospels, St Matthew, St Mark and St Luke. The Gospel of St Thomas is younger (100 years after Jesus Christ) than the other Gospels. 
The Gospel of St Thomas and the Bible give us important guidance about how we can live our lives on the Right Way.
But the Gospel of St Thomas show us more about our inner life and mind/psyche and how we shall find our Truth in our life about Jesus and the meaning/be guided in a good sense in our life.