While exploring Michigan’s Pictured Rocks National Lakeshore Park, twins, Ben and Bekka Cooper, along with a new friend Eli, discover not only the beauty of Lake Superior, but encounter more than they bargained for. With keen eyes and quick thinking, they came upon thieves planning to steal artifacts from sunken ships. Needless to say, their vacation was more than just a camping trip. Click to buy: nationalparkmysteries.com/books

Looking forward to spending the 4th of July in South Dakota with their uncle at Mount Rushmore, Ben and Bekka have no clue about what awaits them at the national monument.  Is there a diabolical plan?  If only the presidents could talk… Click to buy: nationalparkmysteries.com/books

Chosen to attend a reenactment of North against South at Gettysburg National Military Park, Ben and Bekka Cooper, along with their classmates experience a once-in-a-lifetime field trip.  Putting their keen eyes and quick thinking to the test, they uncover a plot to ruin the event.  With the help of a camera, travel book, and a secret weapon, the spies in disguise did not get away with the crime. Click to buy: nationalparkmysteries.com/books

While spending Christmas vacation at Old Faithful Snow Lodge in Yellowstone National Park, Ben and Bekka Cooper, along with their cousin Ian, find themselves entangled in more than chills and spills on ski trails.  In the face of danger and freezing temperatures, the trio of sleuths save the day for an injured friend, and foil the plot of villains to leave their mark on our first National Park. Click to buy: nationalparkmysteries.com/books

“Three, two, one, go!” the ranger yelled.  In a blaze of speed, twenty-five teams of bikers took off as fast as they could,  heading straight into the heart of Shark Valley.  Chosen to hike, bike, and paddle the Everglades National Park Triathlon, Ben and Bekka Cooper find themselves surrounded by more than alligators, crocs, and snakes.  With keen eyes and quick thinking, they discover a get-rich-quick scheme that quickly becomes unglued.  Join the twins and new friends in a suspenseful journey into the Everglades. Click to buy: nationalparkmysteries.com/books

Mystery, adventure, and a dangerous rescue await Ben and Bekka Cooper and their cousins, Kyla and Jack, at Grand Canyon’s Phantom Ranch.  The family reunion quickly turns into a weekend of thrills, chills, and a near spill over a cliff into the canyon below.  But there’s a sneaky thief.  Who is it? Click to buy: nationalparkmysteries.com/books

“Scavenger hunt.  What’s a scavenger hunt?” asked Ben and Bekka when their father told them they had an assignment to walk The Freedom Trail in Boston National Historical Park as undercover detectives.  Join the twins as they hunt for mysterious clues, uncover a plot hanging in the stairway of an old brick church, and encounter danger like they never have before. Click to buy: nationalparkmysteries.com/books

Chosen to participate in a STEM study of volcanoes, Ben and Bekka, along with students from other NEWS Science Clubs, soon learn the danger of being close to an active volcano.  Would Kilauea erupt before they finished their science experiments?  Would they get off the island before the volcano erupted?  Would they be trapped by new lava on the Trail of Craters Road?  Another exciting adventure for the Cooper twins while on the Big Island of Hawaii. Click to buy: nationalparkmysteries.com/books

Mystery Trip? What’s a mystery trip Ben and Bekka wondered as they read the invitation from their Uncle Paul. Not sure what to expect, the twins are taken deep into Mammoth Cave on a Trog Tour. Along with other troggers, they form the MACA Geologist Club in search of a missing fossil that will make them famous! Join the twins for this ninth mystery–if you are brave enough. Click to buy: nationalparkmysteries.com/books