Plain and simple PDF/CBZ/CBR viewer with bookshelf functionality.
It’s all free and source code is available on github.
Github: https://github.com/kurema/BookViewerApp

(Screenshot: Give My Regards to Black Jack/SHUHO SATO/Manga on Web)

PLEASE NOTE: We released BookViewr3 with a totally different user experience. Get it from
https://www.microsoft.com/store/apps/9N607JHLBCZB