Here is a booklet where the Buddha's own definitions of the Four Noble Truths and the Path are quoted and explained by the venerable author who, as a senior member of the Sangha (Order) in Burma, was both deeply learned and well practised in meditation. This Handbook of the Noble Eightfold Path contains all the path-factors clearly described according to the most ancient Buddhist tradition, which has come down to us from the enlightened disciples of the Buddha to the great teachers of the present day in the Buddhist countries of Southeast Asia.
The Venerable Ledi Sayadaw, Aggamahapandita, D. Litt. was an influential Theravada Buddhist monk. He was recognized from a young age as being developed in both the theory (Abhidhamma) and practice of Buddhism and so was revered as being scholarly. He wrote many books on Dhamma in Burmese and these were accessible even to a serious lay person, hence he was responsible for spreading Dhamma to all levels of society and reviving the traditional practice of Vipassanā meditation, making it more available for renunciates and lay people alike.