Apparently O'Reilly is bringing out a book on OCaml. I wonder what animal they'll use for the cover...
The book you are referring too is probably the English translation of the original Développement d'applications avec Objective CAML, published in French by Éditions O'Reilly, in April 2000. After all, CAML was developped in France.
As you can see on the cover, the animal is a horse from the race "Percheron" (in French). I heard that the CAML people were very disappointed that it couldn't be a "Chameau"...
The preliminary translation is available online.
Still if you say "the CAML book" aloud, it'll be ambiguous. No problem in French, I suppose. ("CAML" vs "Chameau")