Preview at WWDC likely in June, followed by September launch.
Paid iBookstore Content Going Live in New Zealand and 17 Latin American Countries
Blog do iPhone is also now reporting that paid books are going live in Brazil, and we've confirmed that paid titles are now available in 16 other Latin American countries as well.
Paid iBookstore titles in Brazilian iTunes Store
The full list of new markets we've spotted so far includes Argentina, Bolivia, Brazil, Chile, Colombia, Costa Rica, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, New Zealand, Nicaragua, Panama, Paraguay, Peru, and Venezuela.
Evidence of new markets for paid iBookstore content comes amid rumors of an iBooks 3.0 launch alongside the "iPad mini" at tomorrow's media event. Apple is expected to make education one of the key themes of the introduction, and with the smaller iPad more closely competing with smaller tablets focused on reading, an expansion of iBookstore content seems to be a logical step.