Dark Tower: Treachery (Dark Tower: Treachery #4)

Due in part to the Good Man Farson's defeat in Hambry, his forces are momentarily weakened. If Steven Deschain and his gunslingers can mount a surprise attack they will not only defeat Farson, but also destroy the arsenal Farson has acquired to destroy Gilead. But is there a traitor in their midst who will alert Farson to the plan? This one you cannot miss!