Only kids can hear them. Which means only kids can save them. When eleven-year-old Mia Bellamy's grandfather falls into a sleep no doctor can explain, his last words point her to a secret seven hundred years old: seven whispering stones hidden inside Europe's most famous monuments - the Tower of London, the Eiffel Tower, the Colosseum, and more - holding back a force called the Fraying, which makes history itself come undone. The stones only speak to children under thirteen. Adults can stand an inch away and hear nothing at all. Armed with her grandfather's journal, an old key, and her best friend Theo (afraid of heights, ghosts, and milk near its date), Mia has until a total solar eclipse to race across Europe and find all seven stones - one step ahead of a charming collector who wants to shatter them and sell the pieces, and one step behind a mysterious boy who knows her family's secrets better than she does. Seven cities. Seven riddles. Three minutes of darkness to save the world. Inside this adventure, readers will find: Real history in every riddle - gladiators, ravens, magic squares, and a bridge built on a number that can't lie. A ticking clock - the eclipse is coming, and the clock never stops. Brains over brawn - every trap is escaped with cleverness, never violence. A team worth rooting for - a puzzle-solver, a walking encyclopedia, and a rival with six hundred years of grudges. A fast-paced middle-grade mystery adventure filled with puzzles, secrets, history, friendship, and a race across Europe. Grab your backpack. The stones are already whispering.