I am satisfied with this book as a gentle introduction to Oracle database concepts.
However, this book is not a 'bible'. You will need to get a different book for detailed coverage of topics and for use as a reference. But if you read this beforehand, you will have a leg up on the very dense DBA books/classes out there.
Of particular value is the step by step guide to downloading and installing Oracle database; something that is just taken for granted in most books. It also covers Oracle from both a WinNT & Unix perspective.
I am only giving 3 stars because the grammar and diction in this book is awful. Absolutely awful! Many readers will find this distracting and loose the benefit this book could provide!
Here is a very ironic example (he is trying to explain networking protocols as equivalent to human language): "Protocol is nothing but the 'grammar' e.g. right now I am using the English protocol to speak with you and you are understanding whatever I am saying since I following English grammar by default. Imagine if I stop following grammar rules than it would be really impossible for you to understand what I am saying. Similarly, when two machines (computers) talks with each other, both of them have to follow the grammar (protocol) of the language (TCP/IP)."