I bought this book after having read The Adversary, hoping it would be as good as The Adversary. It wasn't.
Class Trip, as other reviewers have noted, is a coming-of-age story, sort of. The kid lapses into one self-obsessed reverie after another. Maybe the sort of thing a lonely adolescent is likely to do, but over and over and over . . . That's all there is in this book. The boy is the suffering center of the universe, either saving mankind or being consumed by your typical repugnant, organ trafficking, pretend villains, being ripped apart, mangled, and then gathered up by the nearby stud, in whose arms he will linger forever, near death, but repeatedly revived by the manly one. After a while you might find yourself skipping sentences, then paragraphs, then flipping pages, hoping for something, anything else. If the author were in 11th grade, this would be a composition for English class, and not AP English. Take my advice: skip the book.
It may be that Carrere's nonfiction, The Adversary, based on an actual, repugnant sociopath who murdered his wife, children, parents and father-in-law, succeeded because it wasn't about Carrere.