Seeking impressions on "The Postgresql Reference Manual" - Volumes 1, 2 & 3

Hello,

I created and some clients are using a PostgreSQL database with a web
page connect. This is for holding environmental analytical data,
locations of features, etc. I have added PostGIS but am as yet only
using it minimally. I want to be able to write spatial queries on my
data and later have the client do it via a web interface. The database
is pretty complicated, based on an EQUiS ERD, BUT is currently a
'holding place' as I do most of my queries in the more familiar to me MS
Access front end with ODBC connect

However, I would like to learn more about using this data and queries,
SQL, etc, etc DIRECTLY in PostgreSQL - views, learns more about
constraints, etc, etc - and make the web page more useful, etc - and in
my professional situation I need to be self taught about this (and PHP,
HTML, Java, OpenLayers, MapServer, etc, etc... :-) )

May be this is not the place - but I was seeking impressions on "The
PostgreSQL Reference Manual", 2007 published - Volumes 1, 2 & 3? Worth
dropping $100 of my own money on? Is there a better book or series of
books? Something free online? 'Hands on' is best suited to how I learn,
as I have real data...

Thanks in advance!

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Regards,
GREG COCKS
Data Management Specialist / Scientist / GIS Analyst V
gcocks(at)stoller(dot)com <blocked::mailto:gcocks(at)stoller(dot)com>
S. M. Stoller Corp
105 Technology Drive, Suite 190
Broomfield, CO 80021
www.stoller.com <blocked::http://www.stoller.com/>
303-546-4300
303-443-1408 fax
303-546-4422 direct
303-828-7576 cell