Teenagers are pulled from their normal life to grow up with their half-sibling in Faerie. All the tropes included: no lies but lots of politics, cruel magic, muggle-baiting, beauty with sharp edges. The characters are pretty one-dimensional, and every twist is visible from half a book away. I liked how the protagonist made use of her ability to lie and the fae's tendency to not even suspect lies, but it's not enough to carry a book.