I have a passport card for driving into Canada, which I do regularly. Now I am planning a Caribbean cruise departing from and returning to Miami. Do I need to have a passport book or will the passport card suffice?

What a great question! The best answer to cover all bases is to have both. Under normal circumstances it is a faster process to use the passport card to cross the US/Canadian border. But think about this: What if you are cruising the Caribbean, become ill, and need to be …