X marks the spot! Geronimo and his family journey to the scorching deserts of Mongolia to find their late uncle's hidden treasure. But finding Uncle Wally's hiding place gets a lot harder when his diary is stolen by thieves! Can our heroes escape the desert and retrieve what is theirs?About the Geronimo Stilton series:Geronimo Stilton is a bestselling children's series with a dedicated international fan base. As seen on Netflix, the series follows the adventures of Geronimo Stilton the fa-mouse journalist, as he searches for the next hot scoop.

With illustrations and fun fonts throughout, Geronimo Stilton is perfect for reluctant readers aged 5+ years.