The novel “The Washington Ultimatum” by Lee Gimenez was published for the first time in 2013. It’s part of the J.T. Ryan series.

When a dirty bomb explodes in Honolulu, Hawaii, causing thousands of deaths, the FBI’s top priority is finding the perpetrators. FBI Assistant Director Erin Welch hires J.T. Ryan, a private investigator with a past in Special Forces who has experience in dealing with criminals of all kinds and can operate unofficially anywhere.

Angel Stone is an ex-CIA agent with a grudge against her government. Forcing them to give her a lot of money would make a handsome payback, so she worked with other people interested in striking at the USA or just in good money to build dirty bombs. After the Honolulu attack, she demands a one billion dollar payment to stop her attacks. Can J.T. Ryan find her and her accomplices and stop them in time?