On the heels of Michael Haykin's list, Sean Michael Lucas (Covenant Theological Seminary) shares his list of most influential biographies.
"Since I've read all the books I've listed multiple times, I would consider these my most impactful, influential, and important. And I still believe that D. G. Hart's biography on Machen is simply the finest book I have ever read--a model intellectual biography in every sense of the word."
[Note: Hart's biography is available at Westminster Bookstore for under $10.]