The Artha Panchaka (Five Truths) succinctly describes the Tattva (constitution of things such as soul, matter and Isvara/God), Hita (Means) and Purushārtha (Goal).
The below translation of this work appeared in the Journal of Royal Asiatic Society of Great Britain and Ireland published by Cambridge University Press reproduced in here by permission.
The Artha-Panchaka of Sri Pillai Lokacarya (July 1910). Certain corrections by Sri Govindacharya Swamy to Dr. Grierson’s introduction to this article were published in this article (July, 1912). So these two must be studied together.