Book
Dominion of Dust
Book 4 in the A Time for Swords series.
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In 797, Hunlaf and his crew travel through Cyprus and the eastern Mediterranean to obtain a Christian relic before agents of the Byzantine empress Eirene can secure it. Betrayal leaves them without their prize and pushes the voyage onward to Jerusalem, where competing authorities and relic hunters create new dangers. The mission becomes a race through religious and imperial intrigue in which failure may cost both the treasure and their lives.