Stellarlune

Stellarlune is a fantasy novel by the American writer Shannon Messenger, published in 2022 in the Keeper of the Lost Cities series.

Sophie Foster has altered the situation in the lost cities, and the position she is in now calls for choices rather than action: when to move, who to trust and what to give up. The friends she has relied on are divided and living in different places, and the Black Swan, the group that has been guiding her, wants her attention on its own plans. Sophie's instincts take her somewhere else, towards something called Stellarlune and a figure known as Elysian, which she believes may explain a great deal. As the Neverseen's plans become clearer it begins to look as though every side has miscalculated, and the largest lie in the history of the lost cities may be the one that does the most damage.