Tyers, Kathy. Firebird series #book 5

Times have changed for the telepathic Sentinels in the realm of the Federate WhorlPersecution sends these genetically altered people fleeing to their sanctuary world, but a shipboard disaster exposes High Commander Brennen Caldwell to fatal radiation. Elsewhere, wrongfully imprisoned Sentinel Jorah Caldwell receives a supernatural visitor, who hails Jorah as Boh-Dabar, the prophesied Word to Come. Meanwhile, a mysterious stranger arrives at the sanctuary world, also claiming to be Boh-Dabar. Soon, a tangle of interstellar incidents threatens the Sentinel kindred's very existence. And no one-anywhere-has anticipated the events that will shake the interstellar Federacy

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