Author: Will Kostakis

16-year-old Connor and Sally stumble upon a trapdoor to a secret chamber under their school. Their llife will never be the same again. First book in a duology from YA star, Will Kostakis.

Publisher: Hachette
Genre: YA

Book Link:
https://www.booktopia.com.au/monuments-will-kostakis/ebook/9780734419255.html