The Works of William Perkins fills a major gap in Reformed and Puritan theology. Though Perkins is best known today for his writings on predestination, he also wrote prolifically on many subjects. His works filled over two thousand large pages of small print in three folio volumes and were reprinted several times in the decades after his death. However, his complete works have not been in print since the mid-seventeenth century. This modern typeset edition of the Works includes four volumes of Perkins’s expositions of Scripture, three volumes of his doctrinal and polemical treatises, and three volumes of his practical writings.The present volume contains three of Perkins’s treatises. The first is A Digest or Harmony of the Books of the Old and New Testament, which offers a synopsis of the Bible that relates sacred history to the chronology of the world. Dating God’s creation of the universe in 3967 BC, Perkins develops his overview of redemptive history that culminates in the final judgment.The second treatise is The Combat between Christ and the Devil Displayed. Expounding Matthew 4:111, Perkins shows how Christ’s temptation in the wilderness (1) set Jesus up to serve as the second Adam, overcoming Satan’s temptation in a way the first Adam did not; (2) reveals how the devil assaults the church so that we might be better prepared to resist his temptations; and (3) equipped Christ to be a sympathetic high priest to those who are tempted.The third and most significant treatise is A Godly and Learned Exposition upon Christ’s Sermon in the Mount. “Hereof I have chosen to entreat,” says Perkins, “because it is a most divine and learned sermon, and may not unfitly be called the ‘Key to the whole Bible’; for here Christ opens the sum of the Old and New Testaments.” The fact that Perkins saw the Sermon on the Mount as unlocking the meaning of Scripture in its entirety suggests that his understanding of what Christ declares in Matthew 57 was pivotal to the development of his theology and piety.