Fred's blog, and Learn You Some Erlang for Great Good are invaluable, but on the topic of production systems, his ebook Erlang In Anger (https://www.erlang-in-a

Fred's blog, and Learn You Some Erlang for Great Good are invaluable, but on the topic of production systems, his ebook Erlang In Anger (https://www.erlang-in-anger.com/ https://www.erlang-in-anger.com/) is excellent as well - honestly it's hard to overstate just how much good he's done for the community in terms of documenting and philosphizing about Erlang, architecture and operating production systems. He's solid gold!