*[Real World OCaml](https://realworldocaml.org/v1/en/html/)
*[Think OCaml](http://greenteapress.com/thinkocaml/index.html) - Allen B. Downey and Nicholas Monje
*[Unix System Programming in OCaml](http://ocamlunix.forge.ocamlcore.org/)
*[Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa](http://pauillac.inria.fr/~remy/cours/appsem/) - Didier R´emy
*[Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa](http://pauillac.inria.fr/~remy/cours/appsem/) - Didier Rémy