Reading Level: 8-12 (3rd Grade and up)

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Siblings Seth and Julia are drawn into a new mystery when they find a water park locker that says, "Danger! Open if you dare." As seasoned detectives at Waldameer, the local amusement park, they accept a secret mission from an unknown gamemaster.

 

While they solve riddles and decode hidden messages, Seth and Julia investigate the gamemaster, including something called Operation Neptune. Does the gamemaster work for a top-secret agency? What does Operation Neptune have to do with the water park? Join the kid detectives as they follow the gamemaster's secret mission to its shocking conclusion!

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Both boys and girls enjoy this wholesome, fast-paced mystery that includes real history about Waldameer, one of America's oldest amusement parks.

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"My kiddos love your books! Your writing is wonderful, entertaining, and enjoyable for kids (and adults) of all ages!

- Lauren, parent and teacher

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"I would recommend this book for all kids that like mysteries. I liked that this took place in my hometown."

- Ben, age 8