The Magic Sapphire (Paperback) (ISBN-13: 9781732376953)

Steve, Matt, and Jenny always dreamed of becoming detectives. One day, their dreams become reality when they discover an ancient treasure map written by a pirate named Elias Darby over three hundred years ago. According to legend, the dying pirate hid a magical stone with mysterious powers somewhere in the Northern California hills, with only a poem titled El Alma de Dios as the key to locating it.

As the trio begins their search for the treasure, they unknowingly attract the attention of an international jewel thief named Frank Alexander. When the investigation leads the three friends to a string of hidden caves filled with booby-traps, they are confronted by the jewel thief and his diabolical plan to force the kids to find the stone and give it to him. Given no choice, the detectives must brave the dangerous traps to find the hidden treasure and develop a plan to outsmart the jewel thief.