The Curse of the Mummy's Tomb by R.L. Stine
They're baa-ack! Make way for the bestselling children's series of all time! With a fresh new look, GOOSEBUMPS is set to scare a whole new generation of kids. So reader beware--you're in for a scare! Gabe is exploring the tunnels of an ancient Egyptian pyramid. Unfortunately, he's also lost! And Gabe is not alone. Someone else is in the pyramid, too. Someone. Or something. . .