Large type series

An unnamed spy - perhaps the same reluctant hero of The Ipcress File - is sent to Paris to deliver a file of nuclear secrets to a French doctor, but soon finds himself sucked into a twilight world of sex, blackmail and hidden motive, where friend and enemy become indistinguishable. A 'clinic' on Paris's Avenue Foch designed to cater lavishly for multiple perversions, staffed by a group of sexually and intellectually high-powered girls and equipped with devices ranging from an Iron Maiden to psychedelic truth-drugs -- that's the set-up operated by the enigmatic Monsieur Datt. Naturally, it has a hidden purpose: to compile dossiers of tape and film on influential political clients from East and West. Into this twilight world of decadence and hidden motives come the agents of four world powers.

VENETIAN INTERLUDE Abandoned by her brazen and beautiful older sister in a Venice smoldering with treachery and betrayal, young respectable Mary Porteous found herself destitute and alone. She'd all but given up hope of surviving on her artistic talents, when a mysterious letter arrived, informing her that she had been highly recommended to the grand Palazzo Murano. Baffled but heartened, Mary arrived at the Palazzo and was instantly ensconced in the household. Only then did she discover her unknown benefactor to be none other than Todaro del Doria, a nobleman whose amorous adventures were infamous but whose quiet personal affairs were too dangerous to reveal, a man she didn't know - but with whom she'd soon share an intrigue of the heart that could cost them both their lives...

The selfless love Tessa felt for her grandmother was a natural, ingrained thing; her pride in her family tradition an unquestioned duty, an essential part of being a Jasmyn. Why, then, as she grew up, did she occasionally yearn to be free of Barmote Hall? Was it simply a longing to escape to the village and Reuben Bateman, or was her unhappiness in some strange way linked to the misgivings aroused in her by Grandmamma's tenant at the Lodge, the enigmatic Mrs Masson? Tessa's struggle for spiritual freedom involves her in the discovery of a wrong as cruel as it is unexpected.

From gladysmitchel.com: "Margaret and Kenneth Clifton pass their childhood summers with their two sets of aunts and uncles in the sleepy village of Hill. They spend their days playing in the town's sheepwash, avoiding Sunday school, investigating the old hermit's shack, and deciding which sweets to purchase at Old Mother Honour's shop. The pair has befriended Our Sarah, a matronly girl who supervises the village children like a hen with her chicks. Margaret and Kenneth also make the acquaintance of Lionel Kempson-Conyers, an inquisitive lad staying with his aunt at her manor house. ​The siblings' Aunt Kirstie has for years housed a boarder named Mr. Ward, an eccentric and solitary man whose behavior has become increasingly erratic. He has been digging up the grounds with a spade in places like the chicken run, the garden and the hermit's shack. Margaret is unsettled when she finds a hole shaped like a grave within the run-down shack; a later visit reveals that the hole has been filled in again. ​During a fancy dress (costume) party held at the manor house, tragedy strikes: a girl from London is found dead by the sheepwash, still wearing a dinosaur costume from the party. Mrs. Bradley, in communication with Mrs. Kempson, decides to visit Hill, and some interesting facts surface. The murder victim and young Lionel, heir to the estate, were wearing the same costume; Doctor Tassall, who absented himself from the party at an early hour, was once engaged to the girl, but is now in love with Amabel Kempson-Conyers, Lionel's sister; and Mr. Ward's spade, the apparent murder weapon, is found in the sheepwash. Also, Mr. Ward hasn't been to his room for two days. Margaret and Kenneth soon discover that the grave has been put to use after all, and rush to Mrs. Bradley with the news. The psycho-analyst must then decide whether one or two murderers are living in Hill village."