"Three kids. One monstrous glitch. A whole lot of slime. There's rumor of a major anomaly in a swamp in Sector Z-D71508, and the Glitch Force must investigate. Everything looks normal until nighttime, when a bubbling green ooze begins to seep from the swamp, infecting everything it touches. But Miranda, Zed, and Duncan's efforts to contain it only make the problem worse--the green slime solidifies and mutates into an enormous hostile mob that engulfs everything in its path. But is this green swamp monster the real enemy? A frog tornado, a pack of hissing feral cats, and a hidden trove of deadly potions suggest that this glitch is more complicated than they imagined"--Back cover.