I did a bit of research on ebook reading devices and found out that the market’s rise and fall took place in the early 2000’s.  As the author on the site says, it’s not practical to have a separate device for reading books. Most of the ones available now are integrated into Private Digital Assistants (PDA’s) and have a much smaller reading surface than a standard paperback. Also the dedicated paperback-sized reading devices, which are rare, are quite expensive, costing around $400.