A Map of Days is a sequel to 2015 novel Library of Souls written by Ransom Riggs and fourth book in the series of Miss Peregrine's Home for Peculiar Children. It was released on October 2, 2018 by Dutton Books for Young Readers. This is the fourth book in the series and the first installment of a new trilogy set in the United States; it features the main protagonists from the original trilogy as well as introducing several new key characters. Source: Wikipedia (en)