In this reissue of a classic chapter book series by award-winning author Sharon M. Draper, four boys who call themselves the Black Dinosaurs, find themselves involved in exciting mysteries around their town. In Lost in the Tunnel of Time , the boys discover their hometown was a stop on the Underground Railroad and are excited to explore the part of the tunnel that is right under their school. When a trapdoor slams behind them, locking them in the tunnel, there's only one thing they can do--plunge deeper and deeper into the darkness. Where will the tunnel lead them? And will the old, crumbling walls hold until they find their way to the end?