It's a snowy winter's night in the city. The bedroom lights are off and it's time to settle down to sleep. But wait! What's that? Strange and scary sounds are coming from the streets outside. What can be making these sounds? Are monsters coming? Don't worry! All will soon be revealed. These monsters aren't here to frighten. They are here to help. Through rhyming text and atmospheric artwork, young readers can first imagine what might be making these mysterious sounds. Then a turn of the page identifies the actual "monsters"--vehicles and equipment like snowplows and garbage trucks--that help keep a city running smoothly. And now that all is well, it's time to go to bed! This clever concept is based on a bedtime ritual the author used with her own grandchildren to assuage their nighttime fears.