Of course there are hundreds if not thousands of historical resources available (especially counting biographies) but here are a few:
History of the Christian Church, Philip Schaff Vol 6 (volume 7 in modern reprints) (CCEL)
History of the Christian Church, Philip Schaff Vol 7 (volume 8 in modern reprints) (CCEL)
History of the Reformation of the Sixteenth Century, Merle d'Aubigné, J. H. (Ebook)
A History of American Christianity, Leonard Woolsey Bacon, (CCEL) (Kindle) (Audio)
The Reformers and the Theology of the Reformation, William Cunningham
Historical Theology, William Cunningham
Desiring God Ministries offers a number of free historical resources available for download
A Survey of Church History (Audio), Brian Borgman
History and Theology of the Puritans (Audio), Douglas F. Kelly
The Reformation (Audio), Carl Trueman
Puritan Theology (Video), Joel Beeke
For users of TheWord Bible Software among others, I created a few modules with historical works:
John Calvin Biography Collection
The Life and Times of John Calvin
History of the Reformation by Merle D. Aubigne
