Calibre, the document viewer and organizer (also called an e-library), has received another major update today, just one week away after the 2.4 version was published on September 25. This version brings three new features and includes many bug fixes for the popular document viewer. calibre01 Calibre organizes your ebooks in a library, allows you to view and edit ebooks, but also to search for new ones over the Internet, handle covers, organize ebooks by various criteria and more. The formats supported by Calibre are MOBI, EPUB, LIT, HTML, CBR, ODT, CBZ, PDF, RTF, TXT, PRC and LRS. Calibre is written in Python. Calibre is written in Python and it will even allow you to convert between various ebook formats, and the amount of options available when converting is overwhelming: convert_ebooks The three new features include an ebook reader improvement to the dictionary words lookup function, an improvement to the font embedding system, and the third one, which is no concern for Linux users, a Windows driver for Trekstor Pyrus 2 LED. The number of bug fixes is impressive, there are fixes for the ebook reader, the MOBI format display, the edit book feature and the tag browser. Install Calibre 2.5 in Ubuntu 14.04 There is a simple way to install Calibre using their precompiled packages. To do it, open a terminal and type the following: sudo -v && wget -nv -O- https://raw.githubusercontent.com/kovidgoyal/calibre/master/setup/linux-installer.py | sudo python -c ???import sys; main=lambda:sys.stderr.write(???Download failedn???); exec(sys.stdin.read()); main()??? The instructions for installing Calibre 2.5 can also be found on their official website.