title_body: How can I add custom fonts to my Kobo ereader? Is it possible to add custom fonts to my Kobo ereader? How can I do that?
upvoted_answer: Yes, custom fonts are easily added to any ereader of the Kobo family. An article on MobileRead fully explain how.
  
  
    Fonts can be be very easily added to the Kobo family of eReaders. With
    the Kobo attached to your computer, create a new directory called
    fonts in the root directory of the device (the same location as the
    .kobo, .adobe-digital-editions and Digital Editions directories.
    
    Once this directory has been created, simply copy entire font families
    into it.
    
    A font family consists of four files; one each for Regular, Italic,
    Bold and BoldItalic.
    
    The font should be
    named the same as the system sees the font, so in the case of Linux
    Libertine, it's exactly that. You'll have 4 different font file, and
    you want to name each one in the style &lt;Font Name&gt;-&lt;Font Weight&gt;, so
    for Linux Libertine, you should have 4 files:
    
    Linux Libertine.ttf (or Linux Libertine-Regular.ttf)
    Linux Libertine-Italic.ttf
    Linux Libertine-Bold.ttf
    Linux Libertine-BoldItalic.ttf
    
    For many fonts, the name can simply be what you'd expect it to be, but
    for some, the actual font name is different than what seems obvious.
    And you are correct, all these files go into a folder called "fonts"
    on your Kobo.