Meet Ziggy and his friends Rico, Rashawn, and Jerome! They call themselves The Black Dinosaurs and share exciting adventures in these fast-paced, easy-to-read stories that include historical, social, and scientific information along with action and thrills.

In The Buried Bones Mystery, the boys build a clubhouse in Ziggy's backyard, where they uncover a box of bones while digging to bury their secret treasures. The boys are swept up in a mystery more intriguing—and scary—than anything they could have imagined. Who could have buried a box of bones behind their clubhouse?

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?