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Begun in the third century BC, this work is the oldest Greek translation of the Hebrew Old Testament. The translation is referred to as the LXX (Septuaginta) Greek Old Testament because it is believed to have originated with approximately seventy Jewish scholars of Alexandria, who composed the work in the Koine Greek of their day. Greatly respected in ancient times, the work was revered by Philo and Josephus, quoted much by the writers of the New Testament, and used by the Apostolic Fathers. The oldest surviving codices of this important translation are from the fourth century AD.
If you wish to purchase the parsed version of the LXX with the LEH Lexicon, it can be found here: LXX (Septuaginta) With Parsing and LEH Lexicon.