Lola Benko, Treasure Hunter Books

Summary: Twelve-year-old Lola Benko's archaeologist father vanishes under suspicious circumstances. Official reports claim a flash flood, but Lola's instincts say otherwise. With whispers of a mythical stone capable of world-altering power, Lola enlists her new school friends to unravel the mystery. Can she find her father before the stone falls into the wrong hands, threatening global catastrophe? Embark on a thrilling adventure where every clue could be the key to saving her dad—and the world.