Amazon Kindle ??

I am a BIG shopper at amazon.  But today I got in the mail this new product called a Kindle..

I didnt buy it, somebody sent it to me and it didnt say who in the package.  SO whoever sent it, let me know so I can at least say thank you.  I still dont know what the item does, but I will check it out! THANKS!  Heres a link to whatever the hell this thing is!  AMAZON KINDLE