Books that fit in the young adult genre can either be in the 'young adult' literature section bechind the graphic novel section.  They can also be on the second floor of the library in several sections

To find them

Go to the library homepage

Go to the find resources Box 

Click the 'Books and Media' tab

Next click the drop down menu to 'Words in Subject'

Then type juvenile fiction

This will provide you with works of and about juvenile fiction (this includes print and ebooks as well as videos)