Pretty good time travel mystery by Wilson Tucker. As usual his writing style is good and the story is original. ( )

Lt. Danforth of the local Bomb Squad is dismissed following his failure to halt a series of bombings targeting a rising third party. Hired on privately, Danforth follows a thread of clues tying speculative theories of possible time travel to the bombings and the real motivations behind them. An interesting twist on the typical time-travel trope. ( )