Comments - Dr.Tr1gger

The post is technically there but it's locked until 31 Aug for some reason.
Moddb.com

Well, the most I can tell without just saying the code itself is that you have to sort upstairs book titles alphabetically and then uppercase letters in their titles will spell out the code digids.

I'll add more clues to the mod itself in future versions.

I assume you're talking about the upstairs bookshelf?
If so I can tell you that it's not an anagram. Rather something about order.