WAREHOUSE SALE STOCK: Due to the condition of our storage facility, our books on clearance sale have some folds, scratches, and marks on the cover, but the interior pages are still intact.
My sister, Thea, had discovered an enormouse old castle built by the founder of New Mouse City! She and Trap dragged me along with them to explore it. Inside, we found one hundred keys... but only ninety-nine doors to unlock. What mysterious room did the hundredth key open? It was up to us to find it and reveal its secrets!
Series: Geronimo Stilton
Paperback: 224 pages