Cargo Cult

The art of a fact lies in juxtaposition;
words boxcar'ed together particularly.
But open these boxcars and mostly they're empty;
books are just maps, territorially.

Do We Decimal?

In libraries they sort the books
by numbers on the spine
except it's only some books;
for others, words are fine.

The number system varies;
several methods have been used,
I wanted a good book to read
but now I'm too confused.