Before Will Bagley becomes canonised as the patron saint of Brigham Young and the Mountain Meadows Massacre, here are two (devasting, IMO) reviews of his Blood of the Prophets volume:
Robert D. Crockett, A Trial Lawyer Reviews Will Bagley's Blood of the Prophets
FairMormon, Response to "Blood of the Prophets: Brigham Young and the Massacre at Mountain Meadows"
