The Blue And Silver Shark: A Biker's Story (Book 5 Of The Series‪)‬

Thomas Chandler is a criminal attorney and independent Harley rider; Earle Hastings is an outlaw biker, Harley mechanic, and president of the Vermont chapter of the Skuldmen Motorcycle Club, one of the most notorious outlaw 1%er motorcycle clubs in North America. Despite being from different worlds, the two men are the best of friends. 

While test riding the attorney's Harley, Earle overhears a conversation between three men of Eastern European descent, discussing  a bombing they are planning.  When the horror the world comes to know as the Boston Marathon Bombing occurs, Earle makes a connection to the event that shakes him to the core. 

After Earle is hunted down and shot by one of the terrorists, Thomas goes on a quest for revenge with guidance from two federal law enforcement agents. Enlisting several chapters of Skuldmen in New England to assist him in locating the third Boston bomber, the lawyer is conflicted as he straddles a fine line between the two worlds he lives in, and the choices he must make when it comes to moral justice, or biker justice.