Check out the docker version of calibre if you’re into that https://hub.docker.com/r/linuxserver/calibre-web

Duplicati does this and it’s one of the best backup solutions imo

https://www.marketplace.org/2023/02/14/bls-index-consumer-price-index-formula-calculation/amp/

It doesn’t go into detail about how this can be used to affect or manipulate the cpi number but at least it states the fact and the official reasoning

They want to protect liberty by banning books, got it.