Practical OCaml

My very favorite technical book of last year was Peter Seibel's Practical Common Lisp. APress has recently released Practical OCaml by Joshua Smith. OCaml is the language implemented by F# (I don't know if F# is super- or sub-set -- perhaps the book will clarify).

I doubt that lightning will strike twice, but if Smith's book is half as good as Seibel's I look forward to reading it.