I live just 45 minutes from there so had to visit and photgraph the town and battle field after reading the book. Saw and toured the Richie house too.
As I understand it, and you more learned historians jump in here if I mispeak, the first Battle of Newtonia in September 1862 was the first in a series of small battles and manuvering that would result in the Battle of Prairie Grove.
The second Battle of Newtonia in 1864 was the last battle of Price's Missouri raid and was the battle that literally threw Price out of Missouri.
I recommend the book. It says it was published by the History Press
Quintin