For good fun, here are a few of Lenin's most important contributions to Marxist theory, I highly recommend all of them (but Imperialism especially).
Imperialism, the Highest Stage of Capitalism (must read for any Leftist wanting to understand modern Capitalism, Anarchists included!)
For sites like this that don’t have HTTPS, I post archive.org links instead, because nontechnical people simply aren’t going to go to HTTP sites.
Gotcha! Makes sense. I'll start doing that in the future.