John W. Campbell, Jr. and L. Ron Hubbard pdf searchable (1938-1971)

L. Ron Hubbard was one of the most prolific writers during the golden age of science fiction. He wrote in virtually every genre. But he was not just a writer, but also a researcher of human behavior. He developed the philosophy of the Church of Scientology beginning with Dianetics which was first promulgated by his friend, John W. Campbell, Jr., Astounding Science Fiction editor.
Hubbard's works on the human mind are now found translated into every major language on earth.
These letters are written by John W. Campbell, Jr. They either mention L. Ron Hubbard or his stories.
Perry A. Chapdelaine, Sr/Anthony di Fabio bibliography as of July 13, 2013.
These letters are copies of letters found in John W. Campbell's office files. As such, they're a bit more rough
than the published books, but you can still enjoy them.