Scholars have always corresponded with each other, exchanging articles, books, as well as thoughts (and gossip). An important and growing online site for finding and reading new scholarly papers is Academia.edu.
The site also provides separate groups with a platform of their own to share papers on specific subjects. The reader of this blog will not be surprised that there is a special page for scholars who research the work of Charles Ricketts. The Charles Ricketts group, at this moment, has seven subscribers from America, England, and The Netherlands. There could be more. You are invited to join the group.
There is also a select Charles Shannon group (with two participants). In contrast to these small groups, there are huge numbers of scholars for 'Cultural history' (16.106), 'Literature' (more than 105.000), wheras 'Book history' unites more than 3.400 scholars.