GameStop Italy seems to have mistakenly leaked details of the Final Fantasy XIII Collector’s Edition.
Apparently, the Collector’s Edition will include a sountrack, art book, prequel novel (most likely Episode Zero localized), graphic novel and collector illustration.
That’s what GameStop Italy is listing, of course. Nothing’s confirmed, but if GameStop is listing it, it’s most likely true.
Final Fantasy XIII – Collector’s Edition [GameStop Italia via TLG]