6 books • 3 series
James J.Hill - Empire Builder of the Northwest (The Oklahoma Western Biographies, v. 12)
James J. Hill (The Oklahoma Western Biographies)
Montana
The American West
Battle for Butte (Emil and Kathleen Sick Book Series in Western History and Bi) (Emil and Kathleen Sick Book Series in Western History and Biography)
C.Ben Ross and the New Deal in Idaho