The Chair Man by Alex Pearl

Michael Hollinghurst is a successful corporate lawyer living a comfortable, suburban life in leafy North West London. But on 7 July 2005, his life is transformed when he steps on a London underground train targeted by Islamist suicide bombers. While most passengers in his carriage are killed, Michael survives the explosion but is confined to a wheelchair as a result. Coming to terms with his predicament and controlling his own feelings of guilt as a survivor conspire to push him in a direction that is out of character and a tad reckless. In a quest to seek retribution, he resorts to embracing the internet and posing as a radical Islamist in order to snare potential perpetrators. Much to his surprise, his shambolic scheme yields results and is brought to the attention of both GCHQ and a terrorist cell. But before long, dark forces begin to gather and close in on him. There is seemingly no way out for Michael Hollinghurst. There is nowhere to hide. He has become, quite literally, a sitting target.