"The Carls disappeared the same way they appeared, in an instant. While they were on Earth, they caused confusion and destruction without ever lifting a finger. Well, that's not exactly true. Part of their maelstrom was the sudden viral fame and untimely death of April May: a young woman who stumbled into Carls' path, giving them their name, becoming their advocate, and putting herself in the middle of an avalanche of conspiracy theories. Months later,...