The Adventurer: The Curse of the Midas Box.

Seventeen-year-old Mariah Mundi's life is turned upside down when his parents vanish and his younger brother is kidnapped. Following a trail of clues to the darkly majestic Prince Regent Hotel, Mariah discovers a hidden realm of child-stealing monsters, deadly secrets and a long-lost artefact that grants limitless wealth—but also devastating supernatural power. With the fate of his world, and his family at stake, Mariah will risk everything to unravel the Curse of the Midas Box.