Queen of Demons (1998) is a fantasy novel by American writer David Drake, part of the series Lord of the Isles.
Plot introduction
This book in the series covers approximately 35 days, starting on the second day of the second month (Heron) and ending on the seventh day of the third month (Partridge). For the most part it follows the adventures of two men (Garric and Cashel) and four women (Liane, Ilna, Tenoctris, and Sharina) as they are split up into parallel worlds and slowly reunite, culminating in the defeat of two of their enemies: the Queen and the Beast.
Plot summary
In the introduction, the current King of the Isles, Valence III, and his wizard, Silyon, make a deal with the Beast to regain control of his kingdom from his wife, the Queen. Meanwhile, the main characters are in Erdin where they discover the dead remains of a Scaled Man on their ship, which Tenoctris sees as a bad omen. With the exception of Ilna, they book passage on the ship Lady of Mercy, bound for the Isle of Valles, where Garric intends to declare himself King of the Isles. Before they leave, Ilna gives Liane a sash that she has woven which will notify her if Liane is ever in trouble. Before the ship reaches Valles, a lens appears in the sky and swallows the ship, causing it to wreck.
Garric, Liane, and Tenoctris awake, following the shipwreck, in the land of the Ersa. They eventually make it back to their own world. There they are picked up by a hunting party, led by the noble, Lord Royhas. Rather than dispose of Garric, as he was ordered to, Royhas takes Garric back into the city and holds a council with several other powerful nobles. They express their loyalty to the King but ask Garric's help in overthrowing the Queen. Tenoctris uses a mirror to spy on the Queen and discovers that she is a demon. Garric plans an attack on the mansion. When they've passed all the Queen's safeguards, Garric uses iron to destroy the Queen's gate to another world, but she has already escaped. Following this, Garric appoints himself Prince Regent under King Valence III and demands the allegiance of the Lords who backed him in the revolt. Meanwhile, Admiral Nitker, of the Royal Navy, has declared himself the new Lord of the Isles. Garric promises to destroy Admiral Nitkers and the rebellious navy if they don't return to the King's service. Garric goes before King Valence III and receives his blessing as Prince Regent. Tenoctris discovers that the Queen's mansion was a nexus of portals to many different worlds, one of which led to the Beast.
Cashel uses his quarterstaff to escape the lens that swallowed the ship and saves Sharina as well. They are rescued by Folquin, King of the nearest Isle, and his two wizards, Halphemos and Cerix. Folquin then seeks to marry Sharina. When Halphemos' talking ape, Zahag, throws a fit during a chess game with Liane, Cashel attempts to settle him down. Halphemos, casts a spell to immobilize the ape but the wizardess Silya secretly interferes and sends them to another world. Folquin immediately has Halphemos arrested. Cashel awakes after the transportation on a parallel island of Pandah. He and Zahag meet the lady Sosia who asks Cashel to save her daughter, Aria, who is imprisoned by a wizard Ilmed and the Scaled Men who serve him. Cashel and Zahag succeed in rescuing the princess Aria, but she is less than thrilled. They flee through several magical portals, eventually ending up back on the Isle of Pandah. After they defeat the wizardess Silya, Princess Aria (who has decided to marry Folquin) arranges a boat to help Cashel find Sharina. They arrive in Valles where they run into Ilna, Cerix, and Halphemos and then make their way to the palace where they find Garric, Liane, and Tenoctris.