If you’re planning travel to Canada, Mexico, the Caribbean, or Bermuda, don’t currently hold a passport, and are going to travel by land and / or sea only (not valid for air travel), you can get a passport card rather than a traditional passport book. Why do so? It costs about half what a passport book costs, is why:
NOTES: 1. If you already hold a traditional passport book, you can renew as a passport card for $20!
2. If you are contemplating travel by air to a foreign country in the next ten years, you may wish to go ahead and get the passport book.