Book 1

Defender

by Chris Allen

Published 1 November 2012

Book 2

Hunter

by Chris Allen

Published 1 December 2012

Book 3

Avenger

by Chris Allen

Published 19 February 2015

Book 4

Helldiver

by Chris Allen

Published 10 December 2015

Book 5

Ranger

by Chris Allen

Published 16 June 2017