In volume I, the author has compressed the whole of the Abhidhamma-Pitika and its supplement the Visudhimagga in this small book, mostly written in aphoristic small sentences. The book is very popular and today it is taught as the first book to the students of Abhidhamma in the monas-teries of Ceylon, Burma, Thailand and Indo-China. It is rather better not to call it the first book for it is really a guide through the whole bulk of Abhidhamma-Pitaka. It gives a very vivid exposition of the method adopted in the analysis and grouping of the state of thing (Dhammas) in the Dhammasangini as a system. The Volume II, is meant for the student who after studying the Abhidhammatt-Sangaha is going to take up the original books of the Abhidhamma-Pitaka; and for this reason, the author freely quoted passages from the Pali text, an intimate acquaintance with the languages and style of which would be very necessary at this state.