Teenagers fight for survival on an icy planet in this dystopian science fiction thriller from the New York Times bestselling author of Steeplejack.

Second in the Cathedrals of Glass series.

The struggle is far from over for the deviant passengers of the Phetteron...

Since their ship crash-landed on frozen Valkrys, life for Sola and her companions has been harsh. The deserted, unknown planet has awakened troublesome psychic powers within them. Meanwhile, a malevolent parasite used their minds to turn them against one another. Then what they thought was a rescue team was actually a group of soldiers sent to eradicate them.

Months later, those who survived seem to have settled into a quiet routine. Instead of the protein bars and nutra drinks they once consumed back home, they now eat what small birds and furry animals they can catch. They've also traded server towers and chat rooms for the cobalt blue crystal underground caves and ancient cities that block out their psychic powers and allow them to disconnect from each other.

Sola, however, tires of this life and is desperate to leave this world behind. She believes the ancient crystal ruins hold the solution. What she discovers may help everyone escape Valkrys--if they can still trust each other. Otherwise, the icy planet may be their final resting place...

Second in the Cathedrals of Glass Series

About the Author: A.J. Hartley is the New York Times and USA Today bestselling author of books in a variety of genres and was born and raised in Lancashire in Northern England, . AJ's stories are driven by mystery and danger but also reflect his abiding interest in archaeology, history, and foreign travel. As an English major at Manchester University he took extra classes in Egyptology and got a job working on a Bronze Age site just outside Jerusalem. Since then, life has taken him to many places around the world, and though he always leaned more towards the literary than to the strictly historical, his fascination with the past continues unabated. He has an M.A. and Ph.D. in English literature from Boston University, and he is the Russell Robinson Professor of Shakespeare Studies at the University of North Carolina, Charlotte, and works as a scholar, screenwriter, dramaturg and theatre director.

Tom DeLonge is an award-winning producer, author, platinum recording artist, researcher and entrepreneur from San Diego, CA. Today Tom, with his company To The Stars, produces original content that aims to inspire a newfound appreciation of the profound, yet unresolved, mysteries involving science and the universe through entertainment directly informed by science. His first multi-media franchise Love, told the story of an isolated astronaut on the International Space Station and included a double album by his band Angels And Airwaves with the feature film premiering in 600 theatres across the United States. His next franchise Poet Anderson was inspired by a dream study conducted at Stanford University and spanned an award-winning short film, a chart-topping album, acclaimed comic book series, graphic novel and a YA science fiction novel co-written with NYTimes Bestselling author Suzanne Young. Most recently he is working on Sekret Machines which spans both sci-fi fiction and nonfiction thesis informed by unprecedented access at the highest level of the government and science to uncover information about the UFO phenomenon with renowned authors AJ Hartley and Peter Levenda. His Sekret Machines work has won him the 2017 UFO Researcher of the Year award.