While there have been historical efforts of all kinds in the past to preserve publications, it's not really certain that all published books are preserved.
Case law, however, is an archive that you could say by the motives of both good and evil forces - has been an archive that would be very difficult to destroy.
There is a reason why people who become wise to legalese get free cars, free homes, diplomat passports, tax removal, debts cleared, and cash.
Because they are prepared to enter very serious information into archived court proceedings