I love that book! I have happy memories of poring over it until I understood signatures and functors. It's available free online as well: https://caml.inria.fr

I love that book! I have happy memories of poring over it until I understood signatures and functors. It's available free online as well: https://caml.inria.fr/pub/docs/oreilly-book/html/index.html https://caml.inria.fr/pub/docs/oreilly-book/html/index.html