Rating: 

Apart from being overwhelmed by the sheer complexity of it all, I'm always looking for a definitive, authoritative reference that makes for good bedtime reading (& office reading!).

Looking at the sample chapter has convinced me to purchase this book & I'll do so ASAP.

Plenty of examples & in-depth technical knowledge that us admins seek so earnestly.

O'Reilly has once done it again, with a well deserved highest rating.