Red Bell

Callie Simmons embarks on an investigative journey to find out what really happened on The Oliver Company's Atlas mission. Her goal is to bring to justice anyone who had a hand in sabotaging that mission. She must fly to Fiji to confront Brian Bradley and his team, and unlock the mysteries of his new enigmatic project, simply known as Red Bell.

This is the fourth and final installment of the Callie & Walter series.