I have only had time to skim through each of them. They appear to be pretty well written and quite detailed technically, particularly in the case of the database book. The book is aimed at auditors so should provide a really good angle on the subject of Oracle security auditing. That sounds silly as the purpose of an Oracle security check can be called an audit. Generally though I think of an Oracle security audit as being done by a techie like myself rather than a formal audit firm like one of the big companies such as Delloitte and articles and books tend to be written more from the technical angle rather than the process one. Of course the nature of such an audit will always be technical. I think what I am saying is that other books tend towards the techie end of the DBA and system administrator so I am looking forwards to reading from the point of view of the formal auditor. I am of course very familiar with the subject but I am looking forward to seeing if there are any new things I can learn, especially on the Oracle applications auditing which I know much less well than the database end.
It goes without saying that I will update you all when i have read these books.