your friend can buy a shipping label and then he can send it to you via FedEx or UPS, putting it in the book would not make any difference as the card has RFI ID which gets triggered every time when custom scans the package,so what I did my brother put the whole package just like the way it came and put it in the envelope and sent it to me that’s it.
Having the card stuck at US customs are quite rare, but if it does happen, do not be worried they do open the package and they just gonna forward back to you.