Neptune, king of the ocean, sends half-mermaids Emily and Aaron to the land of the midnight sun to investigate the source of the dangerous storms brewing in the ocean.

A retelling of a twelth-century tale in which a young woman falls in love with a merman and determines to marry him despite their separate worlds.

Edmund Talbot and Herzer Herrick are sent to the Southern Isles to enlist the aid of the mer-folk--people who had altered their bodies into the shape of mythical sea dwellers--in the battle against the fascist dictators of New Destiny.

Jesse and Daisy and their dragon friend, Emmy, try to recover a Thunder Egg from merpeople who stole it from Daisy near the Inn of the Barking Seal, where the cousins are visiting their grandmother Polly.

"Oona and her best friend Otto love to search for treasure...and often find trouble instead. Messy trouble. Tricky trouble. Even shark-related trouble. That's never stopped them before, though! After all, no proper treasure hunt is without some adventure. But when the grandest treasure yet is stuck in a deep, dark rift, Oona's not sure if she can dive right in. What might be waiting for her in those unknown wates?"--

Fourteen-year-old Riko manages to get her delicate older sister Sif and herself to their remote Pacific island home, where an American scientist who falls in love with Sif and discovers her connection with an underwater race creates complications in Riko's life.

During a time of great upheaval, the citizens of Venice make a pact that will change the world. The landsmen of the city broker a treaty with a water-dwelling tribe of deepsmen, cementing the alliance through marriage. The mingling of the two races produces a fresh, peerless strain of royal blood. To protect their shores, other nations make their own partnerships with this new breed-and then, jealous of their power, ban any further unions between...

Un buen día la Luna desaparece y Mirco y Mircoleta abandonan Mircomarca para buscarla. Nunca antes habían salido de su casa, pero esta vez y como Mirconquistador ha sufrido un accidente, deciden ponerse en marcha y se dirigen a visitar a una sirena que...

In a glittering underwater world, where danger lurks behind beauty and power, seventeen-year-old Miranda Sun must decide between her freedom and the love her heart ultimately yearns for.When Miranda Sun returns to Marin on the eve of her eighteenth birthday, this time of her own free will, she quickly learns that her worst fears have been realized. The glittering underwater city is not as she had left it, nor too is Marko, the young king who has dominated...

In a glittering underwater world, where danger lurks behind beauty and power, seventeen-year-old Miranda Sun must decide between her freedom and the love her heart ultimately yearns for. While taking a midnight swim in the ocean, Miranda Sun is pulled beneath the surface only to awaken in a glittering underwater city where she is being held captive by an arrogant young king, Marko. Marko wishes to marry Miranda in order to save his crown from falling...