Google Books lists several, including:
 
Vincent St. John, "The IWW: Its History, Structure, and Methods"  (1912)
Paul Brissenden, "The IWW: A Study of American Syndicalism" (1919),
Lenny Flank, "IWW: A Documentary History" (2007)
 
(To the question of well-researched, that I cannot answer.)
 
As far as I can see, only Brissenden is available online.
 
Charles McCann