[vivaldirules]

My firm recommendation to students (particularly those in technical fields) is that they stay away from portable ebook devices. The time you will spend dealing with them and with their limitations (particularly for PDFs) is far better spent studying. If you have to print the PDFs to see them well, be able to make notes and mark them up, see color graphics in high resolution, skip to different sections readily, etc. then expend the paper and ink on doing just that. It's far better than spending your precious time with a device which is simply a tool that is not yet up to the task.