Pope Benedict XVI's book-length interview is certain to spark global attention, and not only for his comments suggesting that condom use might be acceptable in some circumstances.

In the 219-page book, Light of the World: The Pope, the Church and the Signs of the Times, the German Pontiff spoke candidly on the clerical sex abuse scandal, relations with Islam, papal resignation and the "threatening catastrophe" facing humanity.

The wide-ranging interview was conducted by German writer Peter Seewald, who posed questions in six one-hour sessions last summer. The book was to be released tomorrow at the Vatican, but ample excerpts were published three days earlier by the Vatican newspaper.