Here is the book’s description from the Amazon website:
This ‘Tale From the Land of Verne’ is a children’s short story that takes place in the world of the Grim Doyle Adventures. Enjoy reading about some of the characters you know from Scourge!
Four orphans from the land of Verne are lured into Simian’s Lair – a dark abode whose purpose has been lost to the ravages of time. In it dwells an evil that must be cleansed, and from it, they must retrieve a secret that’s been locked away for centuries. Join them, along with Madam Patrice and Master Rickett, on a journey where courage is found in the darkest of places.
Also includes the first chapter of Scourge: A Grim Doyle Adventure