That’s not entirely fair. While it is true that it doesn’t cover the latest and greatest package management tools or libraries, it does have a nice coverage of

That’s not entirely fair. While it is true that it doesn’t cover the latest and greatest package management tools or libraries, it does have a nice coverage of the core language that is still perfectly valid. It is written for a different target audience than RWO I think - when it was written, most of the people who used Ocaml were PL developers and researchers, so it focuses on the language from that perspective. I wouldn’t disregard it simply due to its age - that is a bad habit I see all too often (“Old = bad!”). Just to make sure before posting this, I went to some random parts of the book and pasted example code into a utop REPL for the latest Ocaml version and it worked fine. So it’s not like the code has bit rotted. It’s still worth a read if someone is interested in languages. It is not worth reading if you are looking for a tutorial on spinning up some form of web app or server app that uses all the shiny things people are currently excited about.