The Black Circle (The 39 Clues, #5)

Firefly & Fern Summary

The Black Circle is the fifth thrilling installment in The 39 Clues series, where young detectives Ian and Amy Cahill continue their high-stakes global quest to uncover family secrets and solve ancient mysteries. Packed with action, puzzles, and unexpected twists, this book will keep readers on the edge of their seats as they follow clues across exotic locations and navigate dangerous rivals. Perfect for kids who love adventure, mystery, and the thrill of discovery.