Time Terror is the sixteenth novel in the Spooksville series. The summary on the back cover reads:

"They did not know who put it there. Adam and his friends have found a strange toy. It is like a windup clock, and also a scary doll. While playing with it, they suddenly find themselves in another land, in a different time. To their great joy they realize they have discovered a Time Toy, a special device that can send them flying through time and space. Pretty soon they are having all kinds of exciting adventures. But what they don't know is that every time they change something in the past, the present also changes. It changes so much that some of them no longer exist in Spooksville as they know it. Soon they are fighting for their lives, and for the life of the whole planet."

It was published in 1997 by Pocket Books, a subdivision of Simon & Schuster Inc, under the A Ministrel Book division.