Once you've downloaded the eBook file from your account or purchase email, you should be able to transfer it to your device using a USB cord or via email, depending on what type of eReader you are using. For instructions on how to email mobi files directly to your Kindle, click here.
For deeper instructions on your specific file/device, either email us at contact@perpetualpublishing.com or simply Google "how to transfer [file type] to [your eReading device]."