This is the third in a series about Amos Decker. Amos has what you might call a photographic memory and is part of a FBI team. He sees a man execute a woman right outside of FBI headquarters. The book leads you on a complex trail to solve the case of WHY? This is the last book in the series about Amos but you really don’t need to read the first two to understand what is happening. This one took me a little longer to read because I had to remember all the different plots and twists.