In picking our Teen Essentials, we asked ourselves what makes a teen book. Is it a young protagonist? Or teen-related issues? We agreed books should have both – and focus on one’s inward journey. These 25 books represent some of our best-loved (and most nostalgic) classics of all-time, as well as recent dystopian and fantasy favorites. And as die-hard John Green fans, we couldn’t pick just one of his books as an essential – instead, we’re celebrating his entire catalog with a ‘Distinguished Achievement Award’. Click on each tab below to see all 25 Teen Essentials and John Green’s complete works.