The Fun Times Brigade by Lindsay Zier-Vogel

Peter Simons doesn’t spend much time at home in his apartment. Thanks to his job at a multinational company, he is often flying around the world, enjoying a life of luxurious solitude in five-star hotels. So when he returns after being away for nine months and notices a strange smell coming from his neighbour’s apartment, he initially tries not to get involved, but when a body is discovered, Peter’s carefully cultivated detachment begins to crumble. And when new people move into the vacant apartment, he gets caught up in a petty dispute that will bring him to the brink of moral ruin.