The Truman Area Community Network
This book, the State of Missouri, an Autobiography was published in 1904 for distribution at the St. Louis World's Fair, also known as the Louisiana Purchase Exposition. It includes a brief history of the state, articles about the important features of the state (Agriculture, Manufacturing, Transportation, etc., and finally articles about the larger cities and all 114 of the counties.
Google Books has scanned this book and it is available on the Internet
It is also available here at archive.org
The entire book can be dowloaded in .pdf form from both Google Books and archive.org, and in other forms (including Kindle, Daisy and EPUB) from archive.org.
NOTE: The Rock Island's line across the state was still under construction in 1903 and the route for this line shown on the Jackson, Johnson, Pettis, and Benton county maps follows the actual line rather loosely. The route shown in the West Central Missouri railroad map is on the correct line.