To find this geocache, you first need to find 3 words, they are in the library somewhere..but the question is where?
Once you find the three words, and figure out their significance, you'll need to go on a short walk, where you will find a hanging bison tube waiting.
The words you are looking for, which must be in this same order are:
"chairs" "fairy" and "haunts"
good luck with your search.