Google quietly brought Play Books today to four new countries: Austria, Belgium, Ireland, and Portugal. The aforementioned countries only had access to Google Play Apps and Music before, so I'm sure the book lovers among those of you who reside in the four territories are ecstatic.
The new Books section as seen in Ireland
Google has been very slow to roll out various content stores worldwide. The last time Play Books expanded was all the way back in March and only included one country - Mexico.