Challenger Deep is a stand-alone novel by Neal Shusterman, author of The Unwind Dystology. It deals frankly with issues surrounding teenage mental illness. Caden, the narrator, experiences paranoid and delusional thinking and is hospitalized. A character attempts suicide. Violence in the book is mostly imaginary and centered on a fantastical ship on which the captain and his parrot want to kill each other. Language is mild, with an instance or two each of “hell,” “damn,” “bastard,” and “ass.” Sexual content is limited to hand-holding and one night of cuddling in bed. Caden’s parents are mildly intoxicated in one scene. Caden takes a “cocktail” of prescribed medications, and the regimen helps him heal.