‘Sinister Dexter’ the third of the Porter Girl novels is an immensely enjoyable read ; all the more so having read the two that came before – ‘First Lady of the Keys’ and ‘The Vanishing Lord’.  Author Lucy Brazier sets all eyes upon Deputy Head Porter as she strives to uphold the honour of Old College – despite the machinations of The Bursar – jeopardising her position and even more alarming her need of tea.  Two young bodies found at the bottom of the Old College garden, quite disturbing, unsettling the students, the staff, to a degree, not least the ever present Dean – though in his case tempered by having to yet again indulge the police. Deputy Head Porter finds herself the go-between (and all too often the go-without when it comes to tea and sausages) – the link of reason (all things are relative) – dealing with…