In the Sea Nymph's Lair — F.J. Hale

Son of a master wizard and beautiful sea nymph, Durril had been blessed with powers of both warfare and wizardry. But none of his training had prepared Durril, his apprentice Arpad Zen, or his familiar Morasha for the magic storm that destroyed their ship and flung them into an angry sea.

Separated from one another, each would fall prey to a different danger: Arpad captured by wreckers out to destroy any witness to their crimes; Morasha pursued by villagers intent on burning her at the stake; and Durril himself held prisoner in the ocean's depths by his mother's sister -- the sea nymph Rusalka who had sworn to win from him the secret of their family's magic even at the cost of Durril's life! But even Rusalka's greed may have to give way before a far greater menace, an all-devouring relic of the Spell Wars, a creature imbued with the power to destroy all the kingdom of both sea and land....