價格：免費
檔案大小：41 MB
版本需求：需要 iOS 9.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Liber is the easiest way to buy and sell college textbooks. Period.
Sign up, choose your university and either search from thousands of books being sold near you, or sell your own books for some extra cash.
支援平台：iPhone, iPad