It might be worth noting that this class (CS1101S in NUS) stops at chapter 3 of SICP. I took the previous scheme version of the class. Btw, I'm curious as to w

It might be worth noting that this class (CS1101S in NUS) stops at chapter 3 of SICP. I took the previous scheme version of the class. Btw, I'm curious as to why the HOJ book didn't get taken down? I checked and the HOP book is not released under a license that allows for derivative works. I'm curious because I've made an interactive version of SICP (using scheme) and I can't find any other books to do this to because no one releases books under permissive enough licenses.