The Paramarthasara, or Epitome of the Highest Truth, is perhaps the earliest work on Advaita Vedanta in existence. Attributed to Adi Sesa, the primeval serpent, or at least to his incarnation Patanjali, it gives in a mere 85 verses, employing ancient Samkhya terminology, a succinct statement of the highest truths taught in non-dual Vedanta. Its teachings have many parallels to those found in Gaudapada's famous Mandukya-karika. This edition includes the original Sanskrit text.
Added to this edition is the later Kashmir Saiva work of the same name, written by Abhinavagupta, which is based on Adi Sesa's earlier work.