A mystery envelope, a riddle, and time is running out...

A mysterious blue envelope appears for the kids of Coral Canal just before Labor Day weekend. Inside is a riddle they must solve in only five days!

With no one, not even their parents, knowing who sent it, Marisa, Avery, Enrique, and friends plunge into a riddle-based adventure. They paddleboard, kayak, and explore the mangrove islands of the Florida Keys. But this riddle hides a secret: only lemon juice can reveal the next clue!

Yet Marisa is so focused on chasing perfect grades that she puts the whole adventure at risk. When a sudden storm traps them on a remote island, she must face a harder challenge than any riddle. Could God be teaching her to let go of perfection and trust Him with her dreams?

Fans of Christian mystery and adventure chapter books for kids, including The Secrets of the Hidden Scrolls and Imagination Station, will be captivated by Key's Secret. With riddles and faith-based lessons, this book is perfect for ages 7-12 and family read-alouds.

Solve the riddle. Unlock the adventure!