The plot of Glenn Beck's new political thriller, The Overton Window, reads a whole heck of a lot like that of Circumference of Darkness, notes the Huffington Post. That just so happens to have been written in 2005 by Jack Henderson. Who just so happened to have ghostwritten Overton Window. Only in Beck's novel, the bad guy is no longer the right wing. Can you guess who is? Correct. The left. Click here to read about the plot similarities. (More Glenn Beck stories.)