Most books store are going into bankruptcy. The old days of the Progress Publisher are gone with the wind. I went inside a Spanish bookstore and they were selling more religious candles than books. New York City and San Franciso used to be the Mecca of the bookstores and there were Marxists books all over the city and most of them have vanished, and using some publishers the transportation cost more than the book itself, we have been forced to buy from Amazon.
Ironically, the USA forced some governments to avoid the sale and reading of Marxist books but they were easy to be purchased in the USA market and they were acquired for a very cheap price. The whole collection of Marx and Engels was $50.00 dollars
I remember the old days when I used to sit down on the floor or a chair inside of a bookstore to read books and there were hundreds of libraries, they also have been closed. Since I had the opportunity I purchased hundred of Marxist books and I have a big collection in my own personal library and I have given away many duplicates that I had to ML organizations