More about calibre
You can have the 6.3.0 version of this program 112.66 MB from this source, and you can also find this program as Calibre. Kovid Goyal distributes the software 100% for free. This tool refers to Productivity, E-books. Versions 6.3 and 4.8 are still the most downloaded ones and can be run on Windows 8/8.1. The most popular installation files for calibre are calibre.exe and calibre (Mac).exe. The antivirus analysis of the direct download link proved it to be safe.