[.ca] The Mississippi Steamboat Era in Historic Photographs: ... (ISBN 0486252604)

very entertaining:
This book admittedly covers a small area, but it contains a wonderful collection of photos you will enjoy reviewing at length, and it isn't like there are a plethora of books out there on this subject.

Historic Photos and more:
This coffee-table-size paperback offers about 100 historic black and white photos of the steamboat era: the boats, the people and the towns. A steamboat lover's dream at a good price.