BiLibre is created on the code base of the currently developing nextgen KyBook 3. Unlike KyBook, BiLibre is intended only for working with PDF and DjVU documents. One of the goals of the BiLibre release - to receive feedback and comments about the proposed design and feature set in nextgen KyBook. Please feel free to share your suggestions and impressions about the future of KyBook.
Please read FAQ before report about a problem