A short post about a major update.

The two Parts of my notes on category theory are now two separate PDFs, and all the chapters in Part I have now been revised (with the last chapters significantly rewritten since the last update). So here they are!

*Category Theory I: Notes towards a gentle introduction.**Category Theory II: More notes towards a gentle introduction.*

Part I is still very much work in progress, but there are more than enough major improvements since the last version to make it worthwhile to post this update. I think the *structure* of Part I, the overall order in which topics are tackled, should remain stable from now on: but I’ll certainly want to return to improve the treatment of some of those topics. So all comments on the current version will be immensely useful.