I’m a Fan is a disturbing, direct and skilfully observed look at race, class and envy. It’s funny, too, with the narrative told from the protagonist’s view and divided into short chapters given mischievous titles, such as ‘I might look innocent but I screenshot a lot’ and ‘Viennetta really is the epitome of luxury’. I’m a Fan is fast becoming the book of the summer, gaining Patel her own fans, with pictures of its lilac and red cover being shared online. ‘I didn’t want it to be an enjoyable book,’ she says. ‘I wanted people to be scared of it. What I didn’t expect was to get so many messages from people saying they needed this.’ She laughs. It’s a humid Friday in Bloomsbury and Patel, an assistant director, has been working on a Horrible Histories series. She is wearing a black dress, has a silver nose ring and an armful of silver bangles and is bursting with facts: ‘The Romans invented pie! Pie!’