The 2021 Castlin Manifesto


Dear subscriber, reader, generally awesome cat,

I have finally - much to my wife’s pleasure and Michael Porter’s likely misery - finished and published the 2021 Castlin Manifesto.

As a paying subscriber, you are getting first dibs. As it should be.

In order learn how to access the file, please read this newsletter in its entirety. Once you have, go to:


This post is for paying subscribers