I would recommend John Calvin's commentaries on every book of the Bible for which he wrote a commentary. He is a master exegete, and even after 500 years, his works are worth consulting by all serious students of Scripture. Crossway has put together a series of classic commentaries in an affordable paperback format. The work by Calvin on the Pastorals is particularly interesting because of the insight it gives us to the Reformation understanding of church leadership. A must-read. [Full Review]