Sceadu

Isabella's shadow had been growing larger and larger. Suddenly, it lunged out of the ground and swallowed her, like a python does its unsuspecting prey. King Mortuus seeks to unlock an ancient prophesy and unleash dark forces of Sceadu on our world - he is just missing the final element: four child sacrifices. Then, Isabella, her brother, Emilio and their cousins cross over into the land of shadow, following discovery of a long-forgotten book written by an old explorer whose adventures once led him to Sceadu.
Unless the children can thwart Mortuus and his hordes of ghouls, imps and faeries, the world they love is doomed. "Well-crafted and executed, this is a book that is worthy of belonging to the time-honoured fantasy genre"  - Himanjali Sankar, Formerly Commissioning Editor,   Bloomsbury India"The elements of mystery, fear, fantasy, and adventure make for a potion that will appeal not only to fans of this genre but to new readers as well" -  Ajit Andhare, COO, Viacom 18 Motion Pictures