"A line that should never be crossed is about to be breached. It puts this entire castle in jeopardy—and the life of your friend." From the throne of glass rules a king with a fist of iron and a soul as black as pitch. Assassin Celaena Sardothien won a brutal contest to become his Champion. Yet Celaena is far from loyal to the crown. She hides her secret vigilantly; she knows that the man she serves is bent on evil. Keeping up the deadly charade becomes increasingly difficult when Celaena realizes she is not the only one seeking justice. As she tries to untangle the mysteries buried deep within the glass castle, her closest relationships suffer. It seems no one is above questioning her allegiances—not the Crown Prince Dorian; not Chaol, the Captain of the Guard; not even her best friend, Nehemia, a foreign princess with a rebel heart. Then one terrible night, the secrets they have all been keeping lead to an unspeakable tragedy. As Celaena's world shatters, she will be forced to give up the very thing most precious to her and decide once and for all where her true loyalties lie... and whom she is ultimately willing to fight for.

A curmudgeonly professor journeys to a small town in the far north to study faerie folklore and discovers dark fae magic, friendship, and love in the start of a heartwarming and enchanting new fantasy series. Cambridge professor Emily Wilde is good at many things: She is the foremost expert on the study of faeries. She is a genius scholar and a meticulous researcher who is writing the world's first encyclopaedia of faerie lore. But Emily Wilde is not good at people. She could never make small talk at a party--or even get invited to one. And she prefers the company of her books, her dog, and the Fair Folk. So when she arrives in the hardscrabble village of Hrafnsvik, Emily has no intention of befriending the gruff townsfolk. Nor does she care to spend time with another new arrival: her dashing and insufferably handsome academic rival Wendell Bambleby, who manages to charm the townsfolk, get in the middle of Emily's research, and utterly confound and frustrate her. But as Emily gets closer and closer to uncovering the secrets of the Hidden Ones--the most elusive of all faeries--lurking in the shadowy forest outside the town, she also finds herself on the trail of another mystery: Who is Wendell Bambleby, and what does he really want? To find the answer, she'll have to unlock the greatest mystery of all--her own heart.