I bought this book last week because I am just a beginner at the whole Solaris thing, coming from a Linux background. The book covers a lot of really good timely topics - LDAP, role based access control etc. - and is written real good. It's like an exam guide which is funny - there are loads of review questions in each chapter and little projects to try out. All in all, it's a very comprehensive book for a beginner. And maybe useful for exam study too (are there certs for Solaris 9 yet?).