One could ask why doesn't Z take the initiative to choose a book for himself.
Why didn't he discover
Why didn't he discover
12 Things to do Before you Crash and Burn by himself?
He could go to the school library. Doesn't Z live so close to a public library he can see it out his bedroom window?
Yes, you would be correct., but for some reason the adolescents I know never seem to want to just walk right down the street (or hall for that matter) and look through a bunch of books.
They want recommendations from friends, teachers, parents, probably in that order.
Take a look at Chicago Public Library: Books for Teens to give you ideas about books you should read and then recommend.