Type In Motion

Barbara was correct and indeed Matt Woolman and Jeff Bellantoni did have three books on moving type published.

'Expression of meaning can be accomplished through intonation, which refers to the modulation of a voice-the tone of voice when someone is speaking.'

(22nd Dec 2000, J.Bellantoni and M.Woolman) 

What this quote is telling us the way that i word is presented can also show an expression. This can be emotions like anger, sadness or happiness. 

'words can be animated to simulate intonation the way an actor might speak them, or to support the definition of a word'

This quote explains how animated text can be used. When it says 'intonation the way an actor might speak' this means the movement of the animation. for example if the actor was  saying something quickly then in the animation the text will move across the screen quickly also.