one summer vacation. one wrong turn. one world he never knew existed. fourteen-year-old finn thought his biggest challenge this summer would be surviving his annoying younger brother at their grandma's vermont farm. he was wrong. after stumbling into a mysterious cave in the green mountains, finn plunges into an underground world where two warring civilizations-the ruthless skulls and the defiant hearts-have been locked in conflict for generations. captured, interrogated, and left for dead, finn must rely on his wits and an unlikely ally to survive. but escaping the skulls is only the beginning. injured and alone, finn finds himself among the hearts, where he must learn to fight with weapons he's never held, navigate deadly traps he can't see coming, and earn the trust of people who have every reason to doubt him. with no clear path home and danger lurking in every shadow, finn faces an impossible choice: stay hidden and safe, or risk everything to find a way back to the surface-and to his family. perfect for fans of gregor the overlander and hatchet, trapped below is a heart-pounding adventure about courage, resilience, and discovering who you really are when everything is on the line. **for readers who love: **✓ fast-paced survival adventures✓ underground worlds and hidden civilizations✓ reluctant heroes who rise to the challenge✓ brothers-in-arms friendships forged in danger✓ high-stakes action with heart scroll up and grab your copy today-finn's underground adventure is waiting!