Hello dear readers,

I updated Category Theory Illustrated with new stuff, the book is now nearly 500 pages long, with more than 400 diagrams. There is a new chapter on Types. Read about Type Theory, Haskell, Curry-Howard etc.

That’s it for now, if you like the book, you can buy the full version here
https://abuseofnotation.gumroad.com/

And if you are already doing that, head over to download it.

You can also support me on Patreon, head there if you want to chat:
https://www.patreon.com/abuseofnotation

Also, if you happen to be in Switzerland on June, I will be speaking about category theory in the famous ZuriHac conference:

ZuriHac 2026 < CH Open

The Largest Functional Programming Conference in the World / Sat, 6 June 2026 – Mon, 8 June 2026 OST Campus Rapperswil-Jona, Oberseestrasse 10, 8640 Rapperswil, Switzerland ZuriHac is the biggest Haskell community event in the world: a completely free, three-day grassroots coding festival co-organized by the Zürich Friends of Haskell and the OST Eastern Switzerland…

Hope to meet some of you there!

Yours

Jen