Please add two new books to
http://www.postgresql.org/docs/books/
The two new books are described here
http://www.2ndQuadrant.com/books/postgresql-9-admin-cookbook/
http://www.2ndQuadrant.com/books/postgresql-9-0-high-performance/
Please use the above two URLs and the cover images from there.
Thanks,
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Simon Riggs http://www.2ndQuadrant.com/books/
PostgreSQL Development, 24x7 Support, Training and Services