The Book of Wisdom, or the Wisdom of Solomon, is a book written in Greek and most likely composed in Alexandria, Egypt. It is not part of the Hebrew Bible but is included in the Septuagint. Generally dated to the mid-first century BC, or to the reign of Caligula (AD 37-41), the central theme of the work is “wisdom” itself, appearing under two principal aspects. The first aspect is, in its relation to mankind, wisdom is the perfection of knowledge of the righteous as a gift from God showing itself in action. The second aspect is, in direct relation to God, wisdom is with God from all eternity. It is one of the seven sapiential or wisdom books in the Septuagint, the others being Psalms, Proverbs, Ecclesiastes, Song of Songs (Song of Solomon), Job, and Sirach. It is one of the deuterocanonical books, i.e. it is included in the canons of the Catholic Church and the Eastern Orthodox Church, but most Protestants consider it part of the Apocrypha.