I won't be studying a course this fall

I won't be able to study a course in the semantic web this fall as I have a time conflict with the class schedule. I am still reading this book

Allemang, Dean and Hendler, Jim. Semantic Web for the Working Ontologist: Effective Modeling in RDFS and OWL (Amsterdam: Morgan Kaufmann, 2008).

I am reading chapter 6 now which is about RDFS and is starting to introduce this schema language.