I first read "The Mightiest Machine" in the early 1970's, when it had already a generation old. Of all of John W. Campbell's writings, I consider this to be the best. The characters are individual and real, the scope of the story sweeping, and the details of the conflict riveting. I have managed to locate two copies in paper over the years, only to have them fall apart as the paperback glue failed. But no longer, I have it on my Kindle now! The review concerning "a poor photocopy" must be dated, this opens and reads and changes font size like all good Kindle products.
Come explore the best the 1930's had to offer. Read "The Mightiest Machine".