Kindle is a tool:  A tool can be used for good or for evil.  A hammer can be used to drive a nail or for assault.  As Christians we must be ever aware of how we use certain tools (i.e. The internet as well as things such as Kindle)  When you download reading material for the Kindle, remember to glorify the Lord Jesus Christ.

Till I come, give attendance to reading, to exhortation, to doctrine.  –  1 Tim.othy 4:13

The cloke that I left at Troas with Carpus, when thou comest, bring with thee, and the books, but especially the parchments.  –  2 Tim.othy 4:13