Hi Rudy
As far as I know there is no book about PHP and PostgreSQL.
You find some stuff at http://www.phpbuilder.com (if it is still
online?)
and at http://www.newbienetwork.com there are some tutorials.
A downloadable tutoial is at
http://users1.50megs.com/tomcat/postgresql-tutorial/ .
Greetings
Conni