A New York Times best-selling sci-fi fantasy series with heart.

Amberground is locked in darkness. A man-made star casts only a dim light over the land. The pitch-black wilderness is infested with Gaichuu—colossal insects with metal exoskeletons. The Gaichuu make travel between the cities of Amberground extremely dangerous. But thankfully the Letter Bees, a brave corps of messengers, risk their lives in order to keep the hearts of Amberground connected.

In the town of Honey Waters, Lag seeks out “the Man Who Could Not Become Spirit,” who might have information on the missing Gauche Suede. Lag's disappointed to find out that he's a charlatan. However, the heart of this strange man in this strange little town yields a surprising clue. Lag might be closer than he ever imagined.