The Middleman by Olen Steinhauer. This is a new author to me. It's about a group of left-wing activists who suddenly disappear and go off-grid. A lady FBI agent has been monitoring them for a while, even though there's no evidence they intend violence. Well, things happen, people die, and the surviving members are officially labeled terrorists. Anyway, I have about 100 pages left and some very suspicious characters haven't yet had their involvement adequately explained. If it finishes strong, I'll add Mr. Steinhauer to my list of authors I would read another book by.