no problem. i saw on this account’s summary that you do pdf generation. there are two good books on ocaml, and the second, more ocaml, has a project on producing pdf files. so that seems like it may be of interest to you.
The book is short, but there are plenty of exercises and worked solutions in the back. Do the exercises and you will get your money's worth. I suggest buying it with the bundle because More OCaml is good also.