Forum OpenACS Development: Response to Book recommendations for learning database design?

I've been using OpenACS and Postgres for months and the most valuable reference book for me is

Bruce Momjian's, PostgreSQL: Introduction and Concepts.

I've had a draft copy in PDF of his book that I keep on my desktop.
The Big Benefit is the ability of the PDF reader to search
for specific SQL words such as UNION or DISTINCT or....
AND be able to Quickly find the reference needed.
This is harder to do with the physical book and with the current HTML version on line.
Unfortunately, I don't see the PDF version on the postgreSQL site.

It would be nice if all reference books were PDF so I could use them this way.