Welcome to MobileRead, sonnetaki
A good place to start is reading your users manual. You can find it here........click on the appropriate device and you can download it. Lots of good info there
Let us know how you love you kindle!
http://www.amazon.com/gp/help/custom...deId=200127470
but to answer your question simply, just hook up the usb cord to your pc, then to your K2, and drag the books you want to the "documents" folder. Voila!