Special Interest Groups are also run on a voluntary basis by members of the Society, but with a specific research focus. Their activities and publications are therefore more academic than social. See also the Tolkien Resources links.
Publishes The Tolkien Collector (about 4 a year).
Quettar: Bulletin of the Linguistic Fellowship of the Tolkien Society (irregular).
The Life and the Ancestry (suspended due to lack of contributions).
Please note that Special Interest Groups are affiliated to The Tolkien Society but are independent organisations all run by volunteers and with their own rules and subscription rates.