The "Bible" series are supposed to be encyclopedic in their approach to a subject. Where the subject is too broad for a single volume, the editors typically split it into two or, worse yet, omit topics.
Here, although the series has been split into two, the resulting volume still tries to cover too much territory.
SharePoint 2007 is a fast growing platform because of its versatility. The versatility means complexity for designers and administrators.
While "Microsoft SharePoint Server 2007 Bible" covers virtually every aspect of installing, designing and maintaining a SharePoint Server 2007 installation, its treatment is often reduced to a listing of steps needed to implement a specific operation. This is adequate for many, if not the majority, of tasks involved with installing and maintaining an installation, but in many cases it is not and this is where this volume fails. A little too often for my liking.
Should "SharePoint Server 2007 Bible" be part of your SharePoint Server 2007 library? A qualified yes. If you can only afford one book, then this should be it - but be prepared to do a lot of additional research on the web.
Jerry