Sumatra PDF on Linux
Free PDF, eBook (ePub, Mobi), XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader
Sumatra PDF is a free and open-source document viewer, it supports many document formats including: Portable Document Format, Microsoft Compiled HTML Help, DjVu, EPUB, FictionBook, MOBI, PRC, Open XML Paper Specification, Comic Book Archive file.