The co-creator of Scheme is also co-author of Structure and Interpretation of Computer Programs[0]. Namely, Gerald Jay Sussman[1], the Panasonic Professor of Electrical Engineering at the Massachusetts Institute of Technology (MIT).

In teaching our material we use a dialect of the programming language Lisp. We never formally teach the language, because we don’t have to. We just use it, and students pick it up in a few days. This is one great advantage of Lisp-like languages: They have very few ways of forming compound expressions, and almost no syntactic structure. All of the formal properties can be covered in an hour, like the rules of chess. After a short time we forget about syntactic details of the language (because there are none) and get on with the real issues—figuring out what we want to compute, how we will decompose problems into manageable parts, and how we will work on the parts. Another advantage of Lisp is that it supports (but does not enforce) more of the large-scale strategies for modular decomposition of programs than any other language we know. We can make procedural and data abstractions, we can use higher-order functions to capture common patterns of usage, we can model local state using assignment and data mutation, we can link parts of a program with streams and delayed evaluation, and we can easily implement embedded languages. All of this is embedded in an interactive environment with excellent support for incremental program design, construction, testing, and debugging. We thank all the generations of Lisp wizards, starting with John McCarthy, who have fashioned a fine tool of unprecedented power and elegance.

[0]: https://sarabander.github.io/sicp/

[1]: https://en.wikipedia.org/wiki/Gerald_Jay_Sussman

We used it in the course I had that introduced functional programming. The only memorable thing I can remember writing in it for that class was a topological sort (I believe).