Haha, indeed it is! But what, exactly? After all, the Dewey Decimal system spans multitudes!
I did tell you where to look already, though, even within the library itself...Think back, Officer!
Three twos guide the path you ought seek,
The second game, and second speak.
Seek what follows second's rule;
Riddle two, Passage two, and bright green jewel.
Ah, my mistake. I had assumed you meant a thing rather than a place. I’ve been running low on sleep lately.
Non-fiction section, then, maybe? What might I find there?