JR Hummel is better if you want scholarly work on the subject. Other respected scholars on the subject and related WBTS topics: Gallagher, Foote, Adams, Freeman, Tilley, Dilorenzo, Robertson, Catton.
Some of these things are not like the others,
Some of these things just don't belong,
Can you tell which things are not like the others
By the time I finish my song?