On the Fields of Flanders during World War I, mustard gas explodes all around soldiers in their trenches. On this day though, a German mustard gas shell strikes and a company of British soldiers evaporates in this silent strange event. American soldiers witnessing the event capture two German scientists, looking for answers. This extraordinary event unveils two hundred years of mystery, and the race to find the powerful mineral and its origin.

Former CEO, now Homeland Security Agent, Jack Riepel follows the trail of the event in 2011, beginning with the investigation of a routine student visa violation, linking him to history that began with Benjamin Franklin’s unique discovery in France; continuing through two World Wars, and leading to a plot to kill the President of the United States.

With the George Washington Masonic Temple and the world renowned America’s Guitars Festival in Old Town Alexandria, as the backdrop, Riepel weaves his way through the NSA and Mossad, on a journey to find answers to this centuries old mystery surrounding the mineral.

In Yellow Cross, John Piper allows readers to follow Jack Riepel as he pieces together historic clues, enlisting the support of a Mossad agent, both on the trail to find the rogue terrorist cell, also intent on using the mineral for their own day of destruction.