The Adventure Five meets hidden history in this pulse-pounding middle-grade mystery that proves kids can change the world, one buried secret at a time.When five friends discover a hidden room during library renovations in their small Pennsylvania town, they expect maybe some old books or forgotten furniture. What they find instead? A perfectly preserved Underground Railroad safe house sealed for over 130 years, complete with coded messages, mysterious symbols, and a secret that powerful people will do ANYTHING to keep buried.Alex, Emma, Ben, Sophie, and Jack aren't your typical young detectives. They're smart, scrappy, and absolutely refuse to let uncomfortable truths stay hidden, even when adults tell them to mind their own business. As they decode Civil War-era messages and piece together evidence from multiple sources, they uncover both incredible courage and devastating betrayal. Twelve people escaped to freedom through their town in 1856... but dozens more were sold out by someone they trusted.Here's where it gets real: Not everyone wants this history revealed. Threatening phone calls. Vandalism. Angry town meetings. Actual attempts to destroy their evidence. But these five kids? They stand their ground. Because some truths are too important to stay buried, even when telling them is terrifying.This book delivers: Edge-of-your-seat mystery with real historical stakesAuthentic friendship dynamics (they argue, support each other, and grow together)Age-appropriate handling of serious topics (slavery, racism, moral courage)That delicious Enid Blyton adventure vibe with modern relevanceKids who actually USE THEIR BRAINS to solve problemsMore than just a mystery: This is a story about standing up for truth when it's uncomfortable, honoring forgotten voices, and discovering that courage isn't the absence of fear, it's doing what's right anyway.Ideal for ages 8-13. Teachers and parents: This one sparks conversations about history, justice, and why the past still matters today.