The Damned Busters. To Hell and Back, Book 1

When mild-mannered actuary Chesney Artstruther accidentally summons a demon and refuses to sell his soul, Hell goes on strike - but with no demons to tempt mankind, the world slows down. No temptation means no ambition, and no drive - the world´s manufacturing and agriculture suffers, and something must be done! Chesney agrees to help, but in return we wants to be a superhero with a demonic sidekick! This is a hilariously demonic romp through Hell and Back...