What is paolini's third book called and when is it released. inheriance trilogy by chris paolini?

It is probably called Empire, but it's not certain.What is paolini's third book called and when is it released. inheriance trilogy by chris paolini?
Straight from the horse鈥檚 mouth:


鈥淐hristopher Paolini: I'm tentatitively onsidering ';Empire'; but there's no definite title yet ... 鈥?br>

see one reference:

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