Initial Book Offerings, the core idea of Publica's foundation, works the same as any ordinary ICO's - author raises money for a to-be-written book, in exchange for the money raised author rewards participants with the book tokens. These tokens are locked until the author has finished the book and after unlocked, book tokens are readable and can be exchanged in the book token exchange.
Blockchain based book store and a book token exchange with the PBL token as the lifeblood of the platforms is what Publica's team intends to do.
For more information visit their website!
www.publica.com