The Midsummer Wife by Jacqueline Simonds is a post-apocalyptic urban fantasy drawing on Arthurian legends.
In sixth century Britain, Anya charges her three offspring - Falcon fathered by Merlin, Stephen fathered by King Arthur, and her daughter Arianrhod - to guard the respective rites, relics and heritage of Merlin, Arthur and of the Goddess until the Day Foretold. Almost 1500 years later, in 2029, the nuclear annihilation of London and essentially all its leadership devastates Britain. With Midsummer almost here, the day fortold is fast approaching and Ava Cerdwn, high-priestess of the Goddess, ancestor of Arianrhod, and leader of the sacred Sisterhood, must convince the Merlin and Arthur heirs, Duke Drunemerton (Harper) and Lord Steadbye (Ron), of who she is and that the time has come to step forward and heal the land. Each of the heirs struggle with grief and mental demons. And an ancient and implacable enemy will stop at nothing to thwart their and the Goddess' plans.
The first one third of the book is heavy with set-up, backstory and long conversations and looking at ancient relics as Ava seeks to establish her credentials with both Harper (the Merlin heir) and Ron (the Arthur heir). Harper's distrust and Ava falling for the 'wrong' guy sets up some tension, but these are quickly resolved. The story momentum speeds up as the trio encounter murderous opposition and the final one third kept the pages turning with a cliff-hanger ending.
I did wonder about some of the historical 'facts' (for instance, Arthur's son Stephen arrives in Jerusalem during the Persian Muslim takeover in 636 AD and then takes a bride from Anatolia on the way home 97 years after he was born and 51 years after he died); or the heirs produce elaborate, detailed 'sixth century' tapestries, whereas even in the 12 century wasn't that advanced in this art form. Eleven years into our future, the Goddess religion is well established with only passing mention given to over 1500 years of Christianity in Britain. Even so, Simonds has built up a rich world of myth and legend which values 'a gentle love-centred power', peace and healing. The personal backstory/demons and their doubts and fears add to the portrayal of the characters and I did like how Ava's overcoming of her acrophobia and PTSD was portrayed.
Overall, interesting setting and complex, rich characters in fresh look at the legendary once-and-future king.