This is the fifth installment in the series, and while I enjoyed it, it is my least favorite so far. After the events of the first novel, we return to the Holloway kids, including Maxie, Blue, and Ollie. The most significant breakthrough revealed in the story is that we now know where the disease originated from and how the adults came to be who they are. We know this from the warehouse kids from the science laboratory or the twisted kids as they like to call themselves. Who are deformed in unthinkable ways and can telepathically communicate with the grown-ups. They are the children of parents who were infected with the disease before succumbing to it. They were born with the sickness and were horrifically deformed as a result, and they were kept hidden until the Holloway kids discovered them.
Little Sam and his sister Ella have been attempting to find each other throughout the series and have gotten near so many times previously, which I found irritating. You guessed correctly. In this book, it happens yet again.
Ollie became a character I grew to like more. His response to circumstances is calm and thoughtful, which I admire. He never jumps the gun or acts on impulse. He takes his time, weighs his choices, and chooses the best course of action. He excels at observing situations and assessing people's personalities. I also liked Lettis and her diaries and how Ollie saved her.
Charlie Higson's pacing of his writing is excellent. He is engaging with the story and characters and can be funny and witty but also solemn and thoughtful in other scenes. Its ends on a big cliffhanger more so than any of the previous books. Two more in the series left to read.