Having only read McGuire's Wayward Children novellas before this one, I was very pleased with how (IMO) much better this one was. I can understand them aiming for different things, but this one feels like it leverages many of the better parts of that series (supernatural experiences from the perspective of kids, how they deal with their uniqueness growing up, how they deal with social expectations) and adds a very generous dose of great, focused worldbuilding as well as some structural weirdness - I was apprehensive at first about how the structure of the book mirrored the twin's powers, but it ended up adding to the overall value for sure - to great success. Ultimately this is a fun, heartwarming and satisfying supernatural conspiracy/adventure book.