Help! We Have Strange Powers! (Goosebumps HorrorLand #10) by R.L. Stine

It’s a whole new ride from master of fright and bestselling author R.L. Stine–with a story so fiendish that it can’t be contained in just one book!

Twelve-year-old twins Jillian and Jackson are startled when they discover they can read each other’s thoughts. But that’s not all. They can read other people’s thoughts, too!
The strange new powers are exciting…at first. But soon they discover that somebody else knows their secret. Somebody who will stop at nothing to control their powers….
They can’t start trusting people in HorrorLand, either. One of the kids might be a traitor. Every time is looks as if they are getting away, the bad guys are waiting for them. Who’s too blame?