Book Cover Industrial age

This is a book cover of a book that would've been written about the beginning of the industrial age in the US. I did a collage for my book cover, because I think it is too hard to find a picture that incorporates many aspects of the Industrial age. I chose to use a picture of a factory, a rail road, another factory that makes tools, and a petroleum mine. At the bottom I chose to put a picture of Andrew Carnegie, and the American flag. I wrote that it was written by Andrew Carnegie, Rockefeller, Vanderbilt, technologies and the work force, because all of those made this industry boom