Please add book to series [DONE]

[Alexander Lund]

Thunder CityThunder city - https://www.goodreads.com/book/show/2...
is the newest entry in the mortal engine's series - https://www.goodreads.com/series/2126...
marked on Amazon as book 5 - https://www.amazon.co.uk/Thunder-City...

[Cristina]

Done: https://www.goodreads.com/series/2126...

Please edit the post title with [DONE] at the beginning so other librarians know the status of the request. Thanks!