Here are some more good biographies of folks from the Reformation:

Hellen Stirke: The Ordinary Virgin Mary – Tony Reinke (DG)

Heinrich Bullinger: The Majestic Beard of Zurich – David Mathis (DG)

Conrad Grebel: The Radical Reformer – Abigail Dodds (DG)

John Knox: The Champion of the Kirk – Sinclair Ferguson (DG)

John Calvin: The Genius of Geneva – John Piper (DG)

Robert Estienne: The Ink – Matt Crutchmer (DG)