The Underland Chronicles #4: Gregor and the Marks of Secret

Fourth in the nail-biting fantasy series by the bestselling author of The Hunger Games. Dark clouds are gathering over the Underland as Gregor is drawn ever deeper into its brewing crisis. Rats have been claiming mouse land for generations, forcing the mice to roam the world like vagrants. But now the mice have started vanishing. What is behind this mystery? Are the rats gearing up for a war of epic proportions? Young queen Luxa is determined to find out, and Gregor must help her. But as the stakes grow ever higher, Gregor’s life is on the line…