Originally Posted by jgaiser
If you've got books ready to go, attaching the Kindle to computer should show as a new drive on your windows machine. Just drag and drop the books to the 'documents' directory in the new drive.
However, if these books are acquired from Amazon and have DRM, this will not work, as the files are DRMd to whichever device you downloaded them for.
In this case, you will want to go to your Kindle's archive, and download them from there. Alternately, you can go to your Amazon.com account on the web, and go to Manage Your Kindle, and send each book from there to your new Kindle.