This book supported the curriculum of my introductory computer science course at Tufts University back in 2013. It was hard but amazingly valuable. By the end of the semester, we were doing natural language classification using binary search trees and higher-order functions [1]. I think learning a Lisp-based language first gave me some very powerful foundational problem solving skills that have made me a successful software engineer today.

[1] https://www.cs.tufts.edu/comp/50PSS-2013f/homework/trigrams....