"Caf or decaf?"
Ax: "Caf? Cafffff caf caff caff."
Ax: "There are twenty more of your Earth minutes left."
Marco: "Ax, you're on Earth now. They're your minutes too now."
I read every single book in the main storyline around high school, and about 5 or so of the sidestory ones (Megamorphs, the choose your adventure one, the Hork Bajirr chronicles)
but yea, there's super legit PTSD going on and deathmarches going on by the end of it. Shit gets massively hardcore in those books