Here is my attempt to explain how Europe, the European Union and the Euro differ from each other but are all related to each other. And all are subject to change.
Related reading (suggested by Twitter followers):
The Tragedy of Central Europe - Kundera
Does Central Europe exist? - Timothy Garton Ash
The puzzle of Central Europe - Timothy Garton Ash
At stake in Ukaine's drama is the future of Putin, Russia and Europe - Timothy Garton Ash (Guardian)
Centre of Europe is possibly Lithuania - Wikipedia
Europe: A History - Norman Davies (book)
Europe Europe - Enzensberger (book)
Also Patrick Leigh Fermoy's books.