Storm over Vallia - Dray Prescot, #35

Drak, Crown Prince of Vallia, Dray Prescot's son, is sore beset on three sides. For one, he is leading an army of liberation against the usurper Alloran who had seized part of Vallia and was grinding Drak's troops down with blackest magic and most villainous mercenaries. For two, he is the target of a marriage plot by an allied queen, whose forces he needs desperately. For the third, he is in love with Silda, daughter of his father's loyal friend, Seg the Bowman.
And Silda is now in Alloran's camp, a black leather swordswoman commanding the usurper's do or die guards! Magic, mystery, treason, warfare and romance make a heady concoction, and before this adventure is over, Drak will have had his fill of it all!Storm over Vallia is the thirty-fifth book in the epic fifty-two book saga of Dray Prescot of Earth and of Kregen by Kenneth Bulmer, writing as Alan Burt Akers.
The series continues with Omens of Kregen.