"Wisdom means the skill & ability of the heart alone which must penetrate into everything without exception - even pebbles & grains of sand - that can give rise to attachments."
The Ballad of Liberation from the Khandhas
His students generally believed that he himself never wrote down any of his teachings, but at his death the following poem was found among the few papers he left behind...
Based on the teachings...
Here are some Books of Dhamma which are based on Ven. Achariya Mun's Teachings. They are translated to English by various Bhikkus, and worthy to read to have some wonderful tips for our own practices... I personally find these are so supportive to accelerate the path of Nirvana!