@prologic@twtxt.net I really liked it. One or the other section might feel a bit dated, because it is. But that doesn’t hurt the overall experience at all. Currently, I’m continuing with the next one: https://www.defmacro.org/2006/06/19/fp.html So far I can recomment this one, too. Both are written in an entertaining style and I feel like I have a little bit better understanding of things than before. But some mental power is required to wrap my head around some sections I’ve noticed. It’s no mind candy. :-) But that’s good. I never worked with any real functional language before. All my FP experience is limited what other languages offer in that field.