I love Marie Lu's writing in general and I knew it wouldn't disappoint. From the start, I got goosebumps from reading the Ghosts' description, what an interesting concept. I love sci-fi distopians where characters have to save the world and it reminded me a little of the Illuminae Files, probably because Karensa Federation made me think about the Kerenza colony. The cover is also breathtaking, the colors are very eyecatching.