First of all, this is NOT the first book on the subject of being a DBA! This is a very comprehensive take on the subject of data modeling (even if there is a try to give the reader a grounding in the bare pre-requisites in the beginning of the book). With that in mind, this is in my opinion a good (nearly very good, but I'm not a sufficient expert in this area to make that judgement) book on the subject matter.

Of course, you have to be interested, as the writing is pretty dry.