Every John Green Book Ranked, Because Your Summer Needs All the YA Love

Turtles All the Way Down is nothing if not ambitious. Two friends, Aza and Daisy, are chasing a potentially massive payout if they can track down a mysterious billionaire, giving this story an adventure element. But it's also an unexpectedly harrowing exploration of what it's like to live with OCD. The mental health aspect is done well, but it lacks the narrative cohesiveness of the author's other works. Overall, it's an important read — just not the first Green novel you'd want to grab from your shelf.