Armchair Detective and the Mystery of Mandrake

"e;A warning from Mandrake?"e; The Stokeham Herald is threatened with closure from a 'mystery buyer'. Trench has a deadline of only days to discover the truth. Is it a coincidence that former acquaintance, Sade Thorn now fronts Castle Holdings? Is the head of the other Stokeham leasing company colluding with her? And what is the real reason Mandrake apparently wants to help? Can Trench ally himself with Old Tom's nemesis, even if it is to save the Herald?