In the aftermath of Sombra's return, the balance between light and dark magic has been destroyed and chaos has broken out in Castallan and around the world. Sombra's shadows have taken over to create monstrous versions of everyone Finn and Alfie love, and with war between Castallan and Englass looming, the prince and the thief must band together one last time--to save their entire world. To stop the magical imbalance, they must find the stone relics...

"After running away from home, Sybil Clarion is eager to embrace all the freedom the Belle Époque city of Severon has to offer. Instead, she’s traded high-society soirées for empty pockets. At least she has Esme, the girl who offered Sybil a home, and if either of them dared, something more. While Esme would rather spend the night tinkering with her clocks and snuggling her cats, Sybil craves excitement and needs money. She plans to get both by...

When the owner of the Daily Rat newspaper thinks Thea Stilton, who has vanished without a trace, is responsible for a recent string of robberies in New Mouse City, Geronimo must employ his "famouse" investigative skills to find Thea - and the truth.