She Shall Have Murder

Paranoid Mrs Robjohn is the least favourite client of the legal firm of Daniel Playfair & Son, what with her frequent calls, letters and visits, and her firm conviction that 'they' are out to get her. To Jane Hamish, the firm's legal secretary, struggling to write a murder mystery with the help of her lover, would-be amateur detective Dagobert, Mrs Robjohn seems the ideal murder victim. Then Jane's story begins to write itself when Mrs Robjohn is found dead at her London flat. It seems a real-life murderer is at large, and while not a few of the staff at Playfair's had good reason to dislike Mrs Robjohn, did any of them have reason enough to kill her?