Vb Wyrde creator of the Elthos RPG has been doing a terrific job of going line by line through the original Men & Magic book
Check out those illustrated Barsoom RPG pages!
http://lordgwydion.blogspot.com/ (What a horrible night to have a curse)
Dennis Laffey is doing an excellent series called Mentzer Basic Cover to Cover
The guru of Holmes basic study, always a good read