Paper and Fire, Angel and Liar
"'It's so strange, that you died that particular month,' Peter whispered.
'Poetic, I would say,' he heard her voice behind, after a tiny gust of wind, 'Why did you call me?'"
The first instalment of the Unholy Runaway series, we are taken to the very beginning, where a dissatisfied with his life young man decides to summon a demon, to try to live the remainder of his life in comfort by selling his soul. However, he finds that a certain agreement between demons ruined his plans almost completely, as well as got him into a tricky situation.