Hello @kooki,
Welcome to PayPal Community! I understand that you are having trouble locating a card that was added to your PayPal account. Typically, if the card is not reflecting in your account appropriately, it may not have been added successfully or has been removed from your account. You can attempt to add the card again. However, if you are receiving an error when attempting again, you may need to use an alternative funding source to make the desired book purchase. I hope this helps!
Iris
If you find this post helpful, feel free to provide kudos or accept a post as a solution to help make our community better.
