On: Need advice or assistance for son who is in prison

[Fjolsvith]

And don't order used books. Only new books. Used will get rejected.

[mulmen → Fjolsvith]

Huh, that’s surprising. I’m curious, do you know reason for that?

[calciphus → mulmen]

My understanding is "anything not new might be modified". It's not specific to books.

[selestify → calciphus]

"Modified" as in, contains contraband that gets smuggled in via the book.

[cyberbanjo → mulmen]

Prisons have lots of (seemingly to me arbitrary) rules. Only new books from the printer has been my experience.