House of Odysseus by Claire North

On the island of Ithaca, queen Penelope maintains a delicate balance of power. Many years ago, her husband Odysseus sailed to war with Troy and never returned. In his absence, Penelope uses all her cunning to keep the peace – but this is shattered with the arrival of Orestes, King of Mycenae. Orestes, son of Agamemnon, is mad. Wracked with guilt for putting his own mother to death, he grows ever more unhinged. But a king cannot be seen to be weak. To keep him safe from the ambitious men of Mycenae, his sister Elektra brings him to Ithaca to recover under the protection of Penelope. But no sooner has Orestes arrived then his uncle Menelaus, the blood-soaked king of Sparta, comes looking for him. Menelaus hungers for Orestes’ throne – and if he can seize it, no one will be safe from his violent whims.