Start with high-confidence state & local history books, then narrow by subgenre or adjacent topics.
Commodore Perry in the Land of the Shogun
Rhoda Blumberg
Where Is Alcatraz?
Nico Medina
What Made California the Golden State?: Life During the Gold Rush
Shing Yin Khor
Basher History: States and Capitals
Simon Basher, Dan Green
The Quilts of Gee's Bend
Susan Goldman Rubin
Sacagawea (national Geographic Kids Readers, Level 3)
Kitson Jazynka
The Appalachian Trail
Marion Dane Bauer
Let's Count Oregon
David W. Miles