Books in the The Demon Souls Series series

Winding up in the hands of shadowy organisation known as the Daemonium, Badrick Varner learns a terrible truth.Demons are real, and they are trapped within the souls of humans.As host to his own hellspawn, Badrick must fight to control the darkness within him and use his newly discovered powers for the benefit of mankind, or face eternal imprisonment.But when evil is your only ally can good truly prevail?