What is the difference between a U.S. passport book and a U.S. passport card ?

When considering U.S. passport options for international travel, it's essential to understand the distinctions between the passport book and passport card.
While both serve as official documents, the passport book is universally valid for air, land, and sea travel, featuring multiple pages for visa stamps.
In contrast, the wallet-sized passport card is restricted to land or sea travel to and from Canada, Mexico, the Caribbean, and Bermuda and lacks approval for air travel to other international destinations.
The passport book, resembling a standard book, is generally more expensive than the card but offers greater versatility and acceptance as a primary identification document in various situations.
On the other hand, the passport card, resembling a credit card, is more cost-effective and convenient for frequent land border crossings.
The application processes for both are similar, and the choice between them depends on individual travel needs and preferences.
Opt for the passport book for international flights and broader identification use, or choose the passport card for more affordable and specific land or sea travel situations.