Title: The People of Sparks
Passage: The People of Sparks is a post-apocalyptic science fiction novel by American writer Jeanne DuPrau, published in 2004. It is the second ``Book of Ember'' in the series, and a sequel to The City of Ember; other books in the series include The Prophet of Yonwood and The Diamond of Darkhold.
Question: is there a sequel to the city of ember
Answer: yes