It Glowed Green: Octorn Book One

Becoming allergic to his work is a dangerous prospect for Perth Peringonoa, Octorn's Premier Assassin. When his targets feel something wet and sticky on the back of their neck, rather than the cool steel of his blade, he starts to wonder about his life choices. But leaving the Assassin's Order (while keeping your breath, skin and important organs still inside you), is unheard of.
Faced with his newest assignment, to take the life of someone he quite likes, Perth's perfectly ordered world is...