How can e-books utilise ‘Dynamic Typography’ in a commercially viable and signaficant way? This article seeks to discover potential applications for dynamic typography within the context of e-books. Dynamic and temporal typography are already established spheres of practice within design. Writers such as Michael Worthington and Jessica Helfand recognise the potential that time-based and digital media have in contributing to the field of otherwise static typography. However, as it currently stands, dynamic typography is limited to a particular range of every-day commercial uses such as website banners, public signage, film (Saul Bass' title sequence for North by Northwest, or Channel 4's range of identity's by MPC are some notable examples), and somewhat niche examples within the field of contemporary art, such as the work of Eduardo Kac. Dynamic typography is not commonly used with longer texts, intended to be read over an extended period of time. With this in mind, this research will ask: 'Why not? and how might it be adapted for use over extended reading periods with e-books?'