Most historians make a connection between the “Vaudois” or “Piedmont” non-Catholic Christians of northern Italy/France and the Waldenses. Here is a partial list of authors with the JA Wylie book on-line.
History of the Evangelical Churches of the Valleys of Piedmont, by Sir Samuel Morland, 1658
The Ecclesiastical History of the Ancient Churches of Piedmont, and of the Albigenses, Dr. Peter Allix, 1690.
History and Theology of the Ancient Vallenses and Albigenses Dr. George S. Faber, 1838.
Excursion to the Mountains of Piemont William S. Gilly 1826.
The Waldenses: Sketches of the Evangelical Christians of the Mountains of Piedmont A. W. Mitchell, 1853.
History of the Vaudois Church Antoine Monastier, 1849.
General History of the Vaudois Churches by Jean Leger, 1669.
The History of the Waldenses J. A. Wylie (1808-1890), London: Cassell and Company, c1860.
This one is found online at
http://www.reformedreader.org/history/wylie/toc.htm
HankD