You have a few choices for adding comics to Comic Viewer:
- Use the integrated web browser to download comics over Wi-Fi or 3G. Click on a link to a file with a name ending in .cbz, .zip, .cbz, or .rar and it will be downloaded directly to the Comic Viewer app.
- Use iTunes to add comics via your computer. See iPad: About File Sharing for details.
- Use another iPad app such as Mail or Dropbox to select a file ending in .cbz, .zip, .cbr, or .rar and you will be given the option to Open in... Select Comic Viewer from the app list.