Aza is in many ways a typical sixteen-year-old girl. She worries about saving for college, studies and hangs out at Applebee’s with her best friend Daisy, alternately loves and feels suffocated by her overprotective mother, and misses her father who passed away eight years ago. However, Aza’s Obsessive Compulsive Disorder (OCD) wracks her with unrelenting thoughts about germs, disease, and death, to the point that she feels that existing inside her body is like being inside an ever-tightening spiral. When Daisy concocts a crazy scheme to find a missing billionaire who is wanted for embezzlement in order to collect a $100,000 reward, Aza finds herself caught up in a twisted mystery with the billionaire’s lonely, poetic son Davis at the center. None of these distractions is enough, however, to stop the interior voices that threaten to take over her life. John Green’s latest is a sensitive, authentic portrayal of chronic mental illness.