From Reuters (h/t The Bride and the Dragon):
Pope Benedict’s second encyclical will be released next week, the Vatican said on Friday.
The encyclical, called “Spe Salvi” (Latin for “Saved by Hope”), is expected to be a largely philosophical and theological work but also touch on themes such as the role of political systems in building a better world.
It will be released on Nov. 30.
[…]
The Pope, who was elected in 2005, is believed to be working on a third encyclical on the theme of social justice. That writing is expected to be released next year.