Using readers' advisory guides and bibliographies is a way to find information about YA literature.
This bibliography of 50 books is a well rounded overview of classic YA literature including graphic novels and a few nonfiction titles as well as novels.
Teen Genreflecting 3 by 
Thematic Guide to Young Adult Literature by 
Historical Fiction for Teens by 
This Is My Life by The following databases are good sources for criticism and analysis of Young Adult Literature:
Subjects: History, Literature, Sociology, Psychology, Political Science, Biology, Chemistry, Physics, Mathematics. Art.
Multidisciplinary index to peer-reviewed journal and magazine articles; some full-text; constructs bibliography in five different citation styles.
Young Adult Literature, Fourth Edition by 
A Velocity of Being: Letters to a Young Reader by 
Handbook of Research on Children's and Young Adult Literature by Reviews of YA literature written by librarians and other educators are published in the following journals:
