Jim Henson's Fraggle Rock. Where is it?

Summary/Review: "A stand-alone Fraggle Rock adventure for young readers. Gobo is in a crisis! He's lost the thing most precious to him, the one thing that holds his whole entire universe together! He enlists the help of Boober, Mokey, Red, and Wembley to search high and low in every nook and cranny in Fraggle Rock to recover what was lost. But in all the excitement, Gobo hasn't told them what they're looking for and what they find might surprise them."--www.bookdepository.com