James Buchanan (1804–1870) was a Scottish minister and theologian. He joined the Free Church of Scotland in 1843, and succeeded Thomas Chalmers as professor of systematic theology at the New College of the Free Church in Edinburgh in 1847, a post he held for twenty-one years. Buchanan's magnum opus was The Doctrine of Justification, which still has great value as a classic treatment of the article by which Martin Luther says the church stands or falls. He covers biblical, systematic, and historical ground in his work, but is never far from a warm-hearted evangelical delight in the doctrines he is expounding.

This book has been considered by academicians and scholars of great significance and value to literature. This forms a part of the knowledge base for future generations. So that the book is never forgotten we have represented this book in a print format as the same form as it was originally first published. Hence any marks or annotations seen are left intentionally to preserve its true nature.