"I've been a scoundrel, a thief, a blackmailer and a whore, but never a murderer. Until now..." The year is 1929. As the world teeters on the brink of a global recession, Bletchley Park plays host to a rather special event. MI5 is celebrating its twentieth anniversary and a select band of former and current employees are gathering at the private estate for a weekend of music, dance and heavy drinking. Among them is Sir Hilary Manningham-Butler, a middle aged woman whose entire adult life has been spent masquerading as a man. She doesn't know why she has been invited – it is many years since she left the secret service – but it is clear she is not the only one with things to hide. And when one of the other guests threatens to expose her secret, the consequences could prove disastrous for everyone. Keywords: 1920s, 1929, 1930s, agatha christie, turing, art deco, blackguard, bletchley park mansion. bletchley park novel, bletchley park novels, bletchley mystery, bletchley murder, bletchley murders, bletchley spies, bletchley spy, bletchley park mystery, blecthley park murder, bletchley murders, bletchley spy, british mystery books, code, comedy, comedy detective, comedy novel, comedy detective book, country house, country house murder, country house murder mystery, country house mystery, country house mystery book, cross-dressing, cross dressing, cross dressing detective, cross-dressing detective, cross-dressing novel, cross-dressing books, detective mystery, detective mystery's, drunk detective, enigma, espionage, fanny leon, farce, farcical mystery, female detective, female detectives, female secret agent, flashman, flashman at the charge, flashman and the great game, flashman's lady, flashman and the redskins, fun mystery novel, fun detective novel, fun novel, george macdonald fraser, girl detective, girl detectives, golden age, golden age crime, golden age detective, harry flashman, hilary manningham-butler, sir hilary manningham-butler, sir hilary, historical whodunnit, hopeless detective, jazz age, lady detective, lady detectives, lgbt, lgbt fiction, lgbt mystery, lgbt whodunnit, light mystery, light mystery novel, light novel, living a lie, mi5, mi6, morris oxford, morris oxford car, mystery farce, mystery novel, mystery novels, old-fashioned, old fashioned, pg wodehouse, p.g.wodehouse, p g wodehouse, wodehouse, reluctant detective, roaring twenties, rotter, royal flash, scandal at bletchley, scoundrel, secret agent, secret agents, secret service, sis, spies, spy, butler did it, the butler, butler book, traditional mystery, traditional detective, transvestism, transvestite, transvestite detective, transvestite mystery, unreliable detective, vernon kell, sir vernon kell, vintage detective, vintage detective novel, vintage mystery, whodunnit, woman detective, woman living as a man, woman living as man, woman pretending to be a man, women detectives, women pretending to be men, woman spy, women spies, female spy, female spies, girl spy, girl spies, jazz age murder, jazz age mystery, jazz age detective, bletchley fiction, bletchley novel, bletchley novels, british spy, british spies, english spy, english spies, english murder, english mystery, english murder mystery, code-breaking, lady spy, lady spies, park novel, park mystery, park murder, park whodunnit, stately home book, stately home mystery, stately home murder, stately home whodunnit, wall street crash, twenties, unreliable narrator, oddball mystery, great depression, harry lime, blackmail, blackmailer, jeeves, jeeves and wooster, bertie wooster, kyril bonfiglioli, bonfiglioli, dont point that thing at me, charlie mortdecai, mortdecai, after you with the pistol, something nasty in the woodshed, flash for freedom, flashman and the dragon, flashman and the mountain of light, flashman and the angel of the lord, flashman and the tiger, flashman on the march, mr american, the pyrates, black ajax, the candlemass road, the reavers, captain in calico, audio mystery, audiobook mystery, comedy audio, comedy audiobook