When a hidden symbol appears on a century-old monument, everyone assumes it points to buried treasure. Three teenage investigators know better than to believe in easy answers.Marcus, Zoe, and Tyler have solved mysteries before, but nothing like this. A geometric pattern that appears for exactly fifteen minutes once per year. A quiet suburb hiding century-old secrets. And a community descending into chaos as treasure hunters arrive with metal detectors and wild theories.What starts as historical curiosity becomes something much bigger. The trio discovers that Nathaniel Heights, the town's founder, left behind more than legends, he left a vision for community that's been systematically dismantled over decades. Five parks lost to development. One barely surviving. And legal documents that might prove everything.But solving the mystery is only the beginning. As Marcus, Zoe, and Tyler dig deeper into their town's history, they uncover uncomfortable truths about preservation and profit, legacy and loss, and what happens when community values clash with economic pressure. Someone has been orchestrating this revelation for forty years, waiting for exactly the right moment to make truth matter.With a city council vote looming and a developer offering millions, the three friends must shift from investigators to advocates. They'll need every skill they've developed, Marcus's research expertise, Zoe's fearless determination, Tyler's empathetic insight, to make evidence matter more than money.Perfect for fans of mystery-solving teens and stories about fighting for what matters, The Secret of the Summer Solstice combines the page-turning pace of commercial fiction with deeper questions about community, legacy, and what we choose to preserve. No supernatural elements, just three sharp kids, one elaborate puzzle, and a truth that's been waiting 120 years to be revealed.Sometimes the greatest treasure isn't gold. It's proof that something belongs to everyone.