Based on Amazon's history, I put together a timeline of major events in the life of the Kindle:
|Amazon Kindle Timeline|
I also skimmed each of the 184 articles from the Kindle Press Releases to create this graph of the number of books available since the Kindle was introduced in 2007:
|Number of Books Available in the U.S. Kindle Store|
Why is this important? It indirectly shows the Kindle market is growing and not dying - Amazon is securing more titles for its growing user base. My research (whenever I finish) won't be obsolete in a few years.
Have you come across a Kindle or other e-reader in any of your investigations? Let me know!