If you purchased crypto via Robinhood but not used a self-custody wallet, it is questionable as to whether you own a digital asset. You actually own some sort of financial instrument issued by Robinhood and no control over any underlying asset.
But a pallet of old academic books is unlikely to be composed of such books. It is probable that most of the books are worth less than the cost of shipping, and some of the books will have some value but not tremendous value. It is astonishing the number of wonderful, high quality books that can be bought on Abebooks for $1.
This argument would be more convincing if the rest of the law treated the unborn as people, but largely it does not. You can't even deduct an unborn child as a dependent on your taxes.