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

A strange blue envelope greets the kids of Coral Canal the week before Independence Day. Inside it contains a riddle and a set of instructions. Nobody, not even their parents, seems to know who sent the riddle, and the children only have six days to solve it and send photographic proof.

With hard work, humor, and perseverance, Marisa, Avery, Enrique, and friends attempt to fulfill the riddle's demands. Snorkeling, tubing, paddleboarding, and hiking, they search everywhere. But Avery has a scary secret that could stop them from solving the riddle in time. Can she trust God before it's too late?

River's Treasure will engage young readers who love mystery, humor, and clean, age-appropriate antics. They won't be able to put the book down until THE END and will be left wishing for the next riddle!

River's Treasure is the fourth book in the Apex Adventure children's series.

Solve the riddle. Unlock the adventure!