The Mark of Athena (The Heroes of Olympus, #3)

by Rick Riordan

He wasn’t sure if he was mad at Annabeth, or his dream, or the entire Greek/Roman world that had endured and shaped human history for five thousand years with one goal in mind: to make Percy Jackson’s life suck as much as possible.

“We’re staying together,” he promised. “You’re not getting away from me. Never again.” Only then did she understand what would happen. A one-way trip. A very hard fall.