Here are sites that will help you find a book! Top 3 offer best results. :)
Here are the other sites that may be helpful.
Lexile Find A Book
(search for an book and then ....
use the advance search on right to find many book by reading level / also called lexile)
https://lexile.com/fab/
Scholastic Find A Book: (an only ok book finding site)
http://www.scholastic.com/bookwizard/
Book lists:
Find books in a series here:
http://www.mymcpl.org/cfapps/juvser/title.cfm
Random YA books recommended by WBUR (can see covers)
http://apps.legacy.wbur.org/books/#youngadult