[["As of December 2019, \"Keeper of the Lost Cities\" is composed of 8 books, the last one being \"Legacy\", released in November 2019. There is still the last book to be announced, which is expected to be released in 2020.", 211.0], ["Keeper of the Lost Cities is a book series written by Shannon Messenger that currently consists of 9 books with a new one expected in 2022.", 32.0]]
how many books are in the series of keeper of the lost cities
literature