What once was lost, now is found! Dr. Greg L. Bahnsen, the definitive champion of Cornelius Van Til’s revolutionary Reformed apologetical method, wrote this systematic treatise and defense of Biblical apologetics many years before his untimely death. Dr. Bahnsen received the typeset proofs for editing, but due to the unfortunate accidents of history, the only copy was lost. The work, consequently, was never published. In our Lord’s Providence, after some twenty years, our friends at Covenant Media Foundation discovered the lost proofs. They recently sent them to us at American Vision where our enthusiastic editors busily began preparing the work for publication. Finally, our work has paid off! This magnum opus of apologetics lays out the Biblical presuppositional method, provides rigorous Biblical proof, and defends the uniqueness of the method. This is the work we all longed for Bahnsen to write, yet never knew that he already had written! Now rescued from the dustbin of history, this monument of apologetics will provide must-reading for Christian defenders of the faith for generations to come.