Following the events of Pulse Point, 12-year old Ama and the other Underlanders living in a world of darkness dig for brine, the City’s real energy source. Underland is a dangerous place: cave-ins, starvation and illness are constant threats. When their leader deserts them, Ama goes looking for him and stumbles on two Citizens. Neither knew the other existed.
18-year old Sari lives in the City, blissfully unaware of what goes on beneath her feet. The disappearance of her best friend, Kaia, has left her feeling isolated. A chance encounter with her sister leads her to join a group called the Resistance who are on a secret mission to reveal the secrets the Council keeps hidden.
When Kaia mounts an attack on the City, Sari and Ama are thrown together in a battle that will decide their futures and the fate of the City.
Colleen Nelson is the author of YA fiction books Finding Hope (2016), 250 Hours (2015), The Fall (2013) and Tori by Design (2011). 'The Fall' and 'Tori by Design' both won the McNally Robinson Book of the Year Award. 'The Fall' was also nominated for the White Pine Award. Currently living in Winnipeg with her husband, two young sons and three grown step-children, Colleen manages to eke out time to write everyday, but usually in the early morning after a strong cup of coffee. A junior high school teacher for ten years before having children, Colleen is familiar and comfortable with the tricky phase of life called 'adolescence'. Now a Teacher-Librarian in Winnipeg, Canada, Colleen is constantly on the look-out for books that will catch the attention of her reading-reluctant sons.