Who knew there was treasure beneath the streets along the Riverwalk? And about Old Lady Hatch's cat? Well, who knew that it was already dead? The mysteries didn't stop there either. Still, solving them was gonna be a whole lot tougher after the new nosy neighbor, Willamina Burchette, showed up. The city maintenance crews and Nick's mom's bad mood weren't gonna help much either. Still, the boys got the job done. They found the treasure, but even more surprisingly, they solved a famous mystery along the way. Read it for yourself. Perfect for ALL ages, and especially for anyone who LOVES a great treasure hunt