Line of Promise publishes the Covenental Catechism series, a progressive course of study of God's covenantal redemptive revelation to His people. It covers from Genesis to Revelation in six books. The series is primarily designed for church education or Sunday School programs, but it is suitable for and used by homeschoolers. Harry Van Dyken wrote the series, and Donald, his son (an OPC pastor and author of Rediscovering Catechism), edited and publishes it.
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