Titles in this set: Geronimo Stilton The 10 Book Collection (Series 4): 1. The Wild, Wild West 2. Operation: Secret Recipe 3. Magical Mission 4. A Very Merry Christmas 5. The Way of the Samurai 6. The Race Across America 7. The Mummy with No Name 8. Down and Out Down Under 9. Valley of the Giant Skeletons 10. Valentine’s Day Disaster Geronimo Stilton 10 Books Collection (Series 5): 1. My Name is Stilton, Geronimo Stilton 2. It’s Halloween, You Fraidy Mouse 3. The Mysterious Cheese Thief 4. Save the White Whale 5. The Wedding Crasher 6. The Karate Mouse 7. Geronimo’s Valentine 8. I Am Not A Supermouse! 9. The Great Diamond Robbery 10. Singing Sensation