Mayhem goes a long way toward answering questions that still linger about the notorious Boston Marathon bombing, such as: Where were the bombs made? And what had been Tamerlan Tsarnaev's relationship to the FBI? This page-turning narrative casts a spotlight on the US Government's relationship with the older Tsarnaev brother as his younger brother, Dzhokhar, continues his efforts to have his death sentence commuted.

The federal government may be forced to confirm a longstanding relationship with Tamerlan and its decision to shield him from investigation for the Sept. 11, 2011 ISIS-style triple murder of three friends. As they infamously did with Whitey Bulger, federal agents appear to have protected Tamerlan because of his value as a paid informant. Mayhem is a substantially revised and updated first paperback edition of Michele R. McPhee's earlier book about the bombing, Maximum Harm.