I’ve just received a copy of a new book by Emilia Curr ás titled Ontologies, taxonomies, and thesauri in systems science and systematics (Chandos information professional series. Oxford: Chandos, 2010). I think the book is worthy of some attention. It is a small text, 133 pages including the index, but it is a very good basic introduction to the KOSs in its title: ontologies, taxonomies, and thesauri. It is especially well-illustrated concerning the differences among these kinds of KOSs. I think that makes it good reading for introductory courses in KO, whether at the undergraduate or graduate level, wherever newcomers to the vocabulary of our discipline are students.