Anyone here read Tufte's books on Data Viz? Are they useful?

I did a while back. If you do a decent amount of work in data viz / dashboarding I think it does help think more about the purpose of everything you show in the viz and what info you're trying to convey.

The open web is dead, long live the open web. ⌐◨-◨

Building /warpcast and /farcaster

— gabrielayuso.com

I think I read all his books. (There are three main ones at least).
Unfortunately I can't recall which one was the most useful.