3D FlipBook - Custom font

I am using your plugin to display individual pages, not a pdf. I've been successful in getting it to render text which I enter (with appropriate tags) in the HTML window for that page. However, my client would like me to use a custom font, and I have thus far been unsuccessful in doing so. I have all the needed font files, and a .css file describing the @font-family and a class referencing it. What should I be doing to make this work? Or is it possible at all?

Thanks!