These history books make up around half the total content of the Old Testament. Of the remainder, the books of the various prophets – Isaiah, Jeremiah, Ezekiel, and the twelve "minor prophets" – were written between the 8th and 6th centuries BC, with the exceptions of Jonah and Daniel, which were written much later. The "wisdom" books – Job, Proverbs, Ecclesiastes, Psalms, Song of Solomon – have various dates: Proverbs possibly was completed by the Hellenistic time (332–198 BC), though containing much older material as well; Job completed by the 6th century BC; Ecclesiastes by the 3rd century BC.