"The eBook is a technology that’s been coming ‘Real Soon Now’ for some
years. You’ve been able to read a whole book on your PC, notebook or PDA
for a while, but so far comparatively few (484,933 sales in Q2, 2005*)
regularly do so. Adobe’s introduction of Digital Editions aims to change
that. In the same way that it’s made the PDF file ubiquitous for
disseminating documentation and sales materials, the company clearly
hopes to do the same for the .epub electronic book."