I recently acquired a copy of SERVING THE READING PUBLIC, which is the 80th anniversary commemoration book published by the American News Company, in 1944. The American News Company was the biggest distributor of periodicals in the country and dominated the distribution of magazines, including pulps, for decades. At the time of the publication of this book, there were 400 branches and distribution points in the U.S., and they served 90,000 retailers.
The American News Company collapsed suddenly and ceased business in 1957, which resulted in many magazines and newspapers without a distributor and having to close down themselves. According to its entry on Wikipedia, the demise of American News Company was "catastrophic" and the reasons for the collapse has been speculated over for decades.
Unfortunately the book is light on copy, and like most of these types of books is self-congratulatory in nature. The narrative is very high level and does not discuss the pulps specifically. It has the look of a yearbook (photos of directors and all the managers are sprinkled throughout) but it does have some nice photos of some of their newsstands. I had to scan these, so sorry if the quality isn't as clear as we'd like. But they're nice to look at.
I know a lot of you know a great deal more about American News; feel free to share what you like in the comments.
And a special hat tip to John Locke of Off-Trail Publications who mentioned this book to me a few weeks ago.